diff --git a/cura/Backups/Backup.py b/cura/Backups/Backup.py
index f935aa6af5..cc47df770e 100644
--- a/cura/Backups/Backup.py
+++ b/cura/Backups/Backup.py
@@ -1,12 +1,13 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
+
 import io
 import os
 import re
 
 import shutil
 
-from typing import Optional
+from typing import Dict, Optional
 from zipfile import ZipFile, ZIP_DEFLATED, BadZipfile
 
 from UM import i18nCatalog
@@ -28,9 +29,9 @@ class Backup:
     # Re-use translation catalog.
     catalog = i18nCatalog("cura")
 
-    def __init__(self, zip_file: bytes = None, meta_data: dict = None) -> None:
+    def __init__(self, zip_file: bytes = None, meta_data: Dict[str, str] = None) -> None:
         self.zip_file = zip_file  # type: Optional[bytes]
-        self.meta_data = meta_data  # type: Optional[dict]
+        self.meta_data = meta_data  # type: Optional[Dict[str, str]]
 
     ##  Create a back-up from the current user config folder.
     def makeFromCurrent(self) -> None:
diff --git a/cura/Backups/BackupsManager.py b/cura/Backups/BackupsManager.py
index bc560a8dd9..67e2a222f1 100644
--- a/cura/Backups/BackupsManager.py
+++ b/cura/Backups/BackupsManager.py
@@ -1,6 +1,7 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
-from typing import Optional, Tuple
+
+from typing import Dict, Optional, Tuple
 
 from UM.Logger import Logger
 from cura.Backups.Backup import Backup
@@ -18,7 +19,7 @@ class BackupsManager:
     ##  Get a back-up of the current configuration.
     #   \return A tuple containing a ZipFile (the actual back-up) and a dict
     #   containing some metadata (like version).
-    def createBackup(self) -> Tuple[Optional[bytes], Optional[dict]]:
+    def createBackup(self) -> Tuple[Optional[bytes], Optional[Dict[str, str]]]:
         self._disableAutoSave()
         backup = Backup()
         backup.makeFromCurrent()
@@ -30,7 +31,7 @@ class BackupsManager:
     #   \param zip_file A bytes object containing the actual back-up.
     #   \param meta_data A dict containing some metadata that is needed to
     #   restore the back-up correctly.
-    def restoreBackup(self, zip_file: bytes, meta_data: dict) -> None:
+    def restoreBackup(self, zip_file: bytes, meta_data: Dict[str, str]) -> None:
         if not meta_data.get("cura_release", None):
             # If there is no "cura_release" specified in the meta data, we don't execute a backup restore.
             Logger.log("w", "Tried to restore a backup without specifying a Cura version number.")
@@ -43,13 +44,13 @@ class BackupsManager:
         if restored:
             # At this point, Cura will need to restart for the changes to take effect.
             # We don't want to store the data at this point as that would override the just-restored backup.
-            self._application.windowClosed(save_data=False)
+            self._application.windowClosed(save_data = False)
 
     ##  Here we try to disable the auto-save plug-in as it might interfere with
     #   restoring a back-up.
-    def _disableAutoSave(self):
+    def _disableAutoSave(self) -> None:
         self._application.setSaveDataEnabled(False)
 
     ##  Re-enable auto-save after we're done.
-    def _enableAutoSave(self):
+    def _enableAutoSave(self) -> None:
         self._application.setSaveDataEnabled(True)
diff --git a/cura/BuildVolume.py b/cura/BuildVolume.py
index 885143ac69..87f0eb543e 100755
--- a/cura/BuildVolume.py
+++ b/cura/BuildVolume.py
@@ -47,10 +47,10 @@ class BuildVolume(SceneNode):
         self._disallowed_area_color = None
         self._error_area_color = None
 
-        self._width = 0
-        self._height = 0
-        self._depth = 0
-        self._shape = ""
+        self._width = 0 #type: float
+        self._height = 0 #type: float
+        self._depth = 0 #type: float
+        self._shape = "" #type: str
 
         self._shader = None
 
@@ -154,19 +154,19 @@ class BuildVolume(SceneNode):
         if active_extruder_changed is not None:
             active_extruder_changed.connect(self._updateDisallowedAreasAndRebuild)
 
-    def setWidth(self, width):
+    def setWidth(self, width: float) -> None:
         if width is not None:
             self._width = width
 
-    def setHeight(self, height):
+    def setHeight(self, height: float) -> None:
         if height is not None:
             self._height = height
 
-    def setDepth(self, depth):
+    def setDepth(self, depth: float) -> None:
         if depth is not None:
             self._depth = depth
 
-    def setShape(self, shape: str):
+    def setShape(self, shape: str) -> None:
         if shape:
             self._shape = shape
 
diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 845ed0325f..e5c0c5688c 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -84,7 +84,6 @@ from cura.Settings.SettingInheritanceManager import SettingInheritanceManager
 from cura.Settings.SimpleModeSettingsManager import SimpleModeSettingsManager
 
 from cura.Machines.VariantManager import VariantManager
-from plugins.SliceInfoPlugin.SliceInfo import SliceInfo
 
 from .SingleInstance import SingleInstance
 from .AutoSave import AutoSave
@@ -110,6 +109,10 @@ from cura.ObjectsModel import ObjectsModel
 from UM.FlameProfiler import pyqtSlot
 
 
+if TYPE_CHECKING:
+    from plugins.SliceInfoPlugin.SliceInfo import SliceInfo
+
+
 numpy.seterr(all = "ignore")
 
 try:
@@ -407,43 +410,6 @@ class CuraApplication(QtApplication):
             }
         )
 
-        """
-        self._currently_loading_files = []
-        self._non_sliceable_extensions = []
-
-        self._machine_action_manager = MachineActionManager.MachineActionManager()
-        self._machine_manager = None    # This is initialized on demand.
-        self._extruder_manager = None
-        self._material_manager = None
-        self._quality_manager = None
-        self._object_manager = None
-        self._build_plate_model = None
-        self._multi_build_plate_model = None
-        self._setting_visibility_presets_model = None
-        self._setting_inheritance_manager = None
-        self._simple_mode_settings_manager = None
-        self._cura_scene_controller = None
-        self._machine_error_checker = None
-        self._auto_save = None
-        self._save_data_enabled = True
-
-        self._additional_components = {} # Components to add to certain areas in the interface
-
-        super().__init__(name = "cura",
-                         version = CuraVersion,
-                         buildtype = CuraBuildType,
-                         is_debug_mode = CuraDebugMode,
-                         tray_icon_name = "cura-icon-32.png",
-                         **kwargs)
-
-        # FOR TESTING ONLY
-        if kwargs["parsed_command_line"].get("trigger_early_crash", False):
-            assert not "This crash is triggered by the trigger_early_crash command line argument."
-
-        self._variant_manager = None
-
-        self.default_theme = "cura-light"
-        """
     # Runs preparations that needs to be done before the starting process.
     def startSplashWindowPhase(self):
         super().startSplashWindowPhase()
diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index e7dca2ae3e..1df694aa86 100755
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -3,6 +3,8 @@
 
 from collections import defaultdict
 import os
+from typing import Union
+
 from PyQt5.QtCore import QObject, QTimer, pyqtSlot
 import sys
 from time import time
@@ -60,17 +62,16 @@ class CuraEngineBackend(QObject, Backend):
         if hasattr(sys, "frozen"):
             default_engine_location = os.path.join(os.path.dirname(os.path.abspath(sys.executable)), executable_name)
         if Platform.isLinux() and not default_engine_location:
-            if not os.getenv("PATH"):
+            env_path = os.getenv("PATH")
+            if not env_path:
                 raise OSError("There is something wrong with your Linux installation.")
-            for pathdir in os.getenv("PATH").split(os.pathsep):
+            for pathdir in env_path.split(os.pathsep):
                 execpath = os.path.join(pathdir, executable_name)
                 if os.path.exists(execpath):
                     default_engine_location = execpath
                     break
 
         self._application = CuraApplication.getInstance() #type: CuraApplication
-        self._multi_build_plate_model = None #type: MultiBuildPlateModel
-        self._machine_error_checker = None #type: MachineErrorChecker
 
         if not default_engine_location:
             raise EnvironmentError("Could not find CuraEngine")
@@ -120,11 +121,11 @@ class CuraEngineBackend(QObject, Backend):
         self._engine_is_fresh = True #type: bool # Is the newly started engine used before or not?
 
         self._backend_log_max_lines = 20000 #type: int # Maximum number of lines to buffer
-        self._error_message = None #type: Message # Pop-up message that shows errors.
+        self._error_message = None #type: Optional[Message] # Pop-up message that shows errors.
         self._last_num_objects = defaultdict(int) #type: Dict[int, int] # Count number of objects to see if there is something changed
         self._postponed_scene_change_sources = [] #type: List[SceneNode] # scene change is postponed (by a tool)
 
-        self._slice_start_time = None #type: Optional[float]
+        self._slice_start_time = time() #type: float
         self._is_disabled = False #type: bool
 
         self._application.getPreferences().addPreference("general/auto_slice", False)
@@ -142,8 +143,7 @@ class CuraEngineBackend(QObject, Backend):
         self._application.initializationFinished.connect(self.initialize)
 
     def initialize(self) -> None:
-        self._multi_build_plate_model = self._application.getMultiBuildPlateModel()
-
+        self._multi_build_plate_model = self._application.getMultiBuildPlateModel() #type: MultiBuildPlateModel
         self._application.getController().activeViewChanged.connect(self._onActiveViewChanged)
         self._multi_build_plate_model.activeBuildPlateChanged.connect(self._onActiveViewChanged)
 
@@ -160,7 +160,7 @@ class CuraEngineBackend(QObject, Backend):
         self._application.getController().toolOperationStarted.connect(self._onToolOperationStarted)
         self._application.getController().toolOperationStopped.connect(self._onToolOperationStopped)
 
-        self._machine_error_checker = self._application.getMachineErrorChecker()
+        self._machine_error_checker = self._application.getMachineErrorChecker() #type: MachineErrorChecker
         self._machine_error_checker.errorCheckFinished.connect(self._onStackErrorCheckFinished)
 
     ##  Terminate the engine process.
@@ -310,6 +310,11 @@ class CuraEngineBackend(QObject, Backend):
         if self._start_slice_job is job:
             self._start_slice_job = None
 
+        if not self._global_container_stack:
+            self.backendStateChange.emit(BackendState.Error)
+            self.backendError.emit(job)
+            return
+
         if job.isCancelled() or job.getError() or job.getResult() == StartJobResult.Error:
             self.backendStateChange.emit(BackendState.Error)
             self.backendError.emit(job)
@@ -447,7 +452,8 @@ class CuraEngineBackend(QObject, Backend):
             # Only count sliceable objects
             if node.callDecoration("isSliceable"):
                 build_plate_number = node.callDecoration("getBuildPlateNumber")
-                num_objects[build_plate_number] += 1
+                if build_plate_number is not None:
+                    num_objects[build_plate_number] += 1
         return num_objects
 
     ##  Listener for when the scene has changed.
@@ -464,7 +470,7 @@ class CuraEngineBackend(QObject, Backend):
         if source.callDecoration("isBlockSlicing") and source.callDecoration("getLayerData"):
             self._stored_optimized_layer_data = {}
 
-        build_plate_changed = set()
+        build_plate_changed = set() # type: Set[int]
         source_build_plate_number = source.callDecoration("getBuildPlateNumber")
         if source == self._scene.getRoot():
             # we got the root node
@@ -476,14 +482,15 @@ class CuraEngineBackend(QObject, Backend):
         else:
             # we got a single scenenode
             if not source.callDecoration("isGroup"):
-                if source.getMeshData() is None:
+                mesh_data = source.getMeshData()
+                if mesh_data is None:
                     return
-                if source.getMeshData().getVertices() is None:
+                elif mesh_data.getVertices() is None:
                     return
 
-            build_plate_changed.add(source_build_plate_number)
+            if source_build_plate_number is not None:
+                build_plate_changed.add(source_build_plate_number)
 
-        build_plate_changed.discard(None)
         build_plate_changed.discard(-1)  # object not on build plate
         if not build_plate_changed:
             return
@@ -577,9 +584,10 @@ class CuraEngineBackend(QObject, Backend):
     #
     #   \param message The protobuf message containing sliced layer data.
     def _onOptimizedLayerMessage(self, message: Arcus.PythonMessage) -> None:
-        if self._start_slice_job_build_plate not in self._stored_optimized_layer_data:
-            self._stored_optimized_layer_data[self._start_slice_job_build_plate] = []
-        self._stored_optimized_layer_data[self._start_slice_job_build_plate].append(message)
+        if self._start_slice_job_build_plate is not None:
+            if self._start_slice_job_build_plate not in self._stored_optimized_layer_data:
+                self._stored_optimized_layer_data[self._start_slice_job_build_plate] = []
+            self._stored_optimized_layer_data[self._start_slice_job_build_plate].append(message)
 
     ##  Called when a progress message is received from the engine.
     #
@@ -658,7 +666,10 @@ class CuraEngineBackend(QObject, Backend):
     ##  Creates a new socket connection.
     def _createSocket(self, protocol_file: str = None) -> None:
         if not protocol_file:
-            protocol_file = os.path.abspath(os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), "Cura.proto"))
+            plugin_path = PluginRegistry.getInstance().getPluginPath(self.getPluginId())
+            if not plugin_path:
+                return
+            protocol_file = os.path.abspath(os.path.join(plugin_path, "Cura.proto"))
         super()._createSocket(protocol_file)
         self._engine_is_fresh = True
 
diff --git a/plugins/CuraEngineBackend/StartSliceJob.py b/plugins/CuraEngineBackend/StartSliceJob.py
index 78dd4eafd2..8e429da14d 100644
--- a/plugins/CuraEngineBackend/StartSliceJob.py
+++ b/plugins/CuraEngineBackend/StartSliceJob.py
@@ -114,13 +114,14 @@ class StartSliceJob(Job):
             self.setResult(StartJobResult.Error)
             return
 
-        stack = CuraApplication.getInstance().getGlobalContainerStack()
-        if not stack:
+        global_stack = CuraApplication.getInstance().getGlobalContainerStack()
+        machine_manager = CuraApplication.getInstance().getMachineManager()
+        if not global_stack:
             self.setResult(StartJobResult.Error)
             return
 
         # Don't slice if there is a setting with an error value.
-        if CuraApplication.getInstance().getMachineManager().stacksHaveErrors:
+        if machine_manager.stacksHaveErrors:
             self.setResult(StartJobResult.SettingError)
             return
 
@@ -129,12 +130,12 @@ class StartSliceJob(Job):
             return
 
         # Don't slice if the buildplate or the nozzle type is incompatible with the materials
-        if not CuraApplication.getInstance().getMachineManager().variantBuildplateCompatible and \
-                not CuraApplication.getInstance().getMachineManager().variantBuildplateUsable:
+        if not machine_manager.variantBuildplateCompatible and \
+                not machine_manager.variantBuildplateUsable:
             self.setResult(StartJobResult.MaterialIncompatible)
             return
 
-        for position, extruder_stack in stack.extruders.items():
+        for position, extruder_stack in global_stack.extruders.items():
             material = extruder_stack.findContainer({"type": "material"})
             if not extruder_stack.isEnabled:
                 continue
@@ -162,7 +163,7 @@ class StartSliceJob(Job):
 
             # Get the objects in their groups to print.
             object_groups = []
-            if stack.getProperty("print_sequence", "value") == "one_at_a_time":
+            if global_stack.getProperty("print_sequence", "value") == "one_at_a_time":
                 for node in OneAtATimeIterator(self._scene.getRoot()): #type: ignore #Ignore type error because iter() should get called automatically by Python syntax.
                     temp_list = []
 
@@ -216,12 +217,11 @@ class StartSliceJob(Job):
                 if temp_list:
                     object_groups.append(temp_list)
 
-            extruders_enabled = {position: stack.isEnabled for position, stack in CuraApplication.getInstance().getGlobalContainerStack().extruders.items()}
+            extruders_enabled = {position: stack.isEnabled for position, stack in global_stack.extruders.items()}
             filtered_object_groups = []
             has_model_with_disabled_extruders = False
-            associated_disabled_extruders = set()
+            associated_disabled_extruders = set()   # type: Set[str]
             for group in object_groups:
-                stack = CuraApplication.getInstance().getGlobalContainerStack()
                 skip_group = False
                 for node in group:
                     extruder_position = node.callDecoration("getActiveExtruderPosition")
@@ -234,7 +234,7 @@ class StartSliceJob(Job):
 
             if has_model_with_disabled_extruders:
                 self.setResult(StartJobResult.ObjectsWithDisabledExtruder)
-                associated_disabled_extruders = [str(c) for c in sorted([int(p) + 1 for p in associated_disabled_extruders])]
+                associated_disabled_extruders = set([str(c) for c in sorted([int(p) + 1 for p in associated_disabled_extruders])])
                 self.setMessage(", ".join(associated_disabled_extruders))
                 return
 
@@ -245,11 +245,11 @@ class StartSliceJob(Job):
                 self.setResult(StartJobResult.NothingToSlice)
                 return
 
-            self._buildGlobalSettingsMessage(stack)
-            self._buildGlobalInheritsStackMessage(stack)
+            self._buildGlobalSettingsMessage(global_stack)
+            self._buildGlobalInheritsStackMessage(global_stack)
 
             # Build messages for extruder stacks
-            for extruder_stack in ExtruderManager.getInstance().getMachineExtruders(stack.getId()):
+            for extruder_stack in ExtruderManager.getInstance().getMachineExtruders(global_stack.getId()):
                 self._buildExtruderMessage(extruder_stack)
 
             for group in filtered_object_groups:
@@ -326,6 +326,8 @@ class StartSliceJob(Job):
     def _expandGcodeTokens(self, value: str, default_extruder_nr: int = -1) -> str:
         if not self._all_extruders_settings:
             global_stack = CuraApplication.getInstance().getGlobalContainerStack()
+            if not global_stack:
+                return str(value)
 
             # NB: keys must be strings for the string formatter
             self._all_extruders_settings = {
diff --git a/plugins/Toolbox/resources/qml/ToolboxAuthorPage.qml b/plugins/Toolbox/resources/qml/ToolboxAuthorPage.qml
index d2f75936d1..04b055ed66 100644
--- a/plugins/Toolbox/resources/qml/ToolboxAuthorPage.qml
+++ b/plugins/Toolbox/resources/qml/ToolboxAuthorPage.qml
@@ -9,17 +9,8 @@ import UM 1.1 as UM
 Item
 {
     id: page
-    property var details: base.selection || dummy_details
+    property var details: base.selection || {}
     anchors.fill: parent
-
-    property var dummy_details: new Object({
-        name: "",
-        description: "",
-        email: "",
-        website: "",
-        icon_url: ""
-    })
-
     ToolboxBackColumn
     {
         id: sidebar
diff --git a/plugins/Toolbox/resources/qml/ToolboxDetailPage.qml b/plugins/Toolbox/resources/qml/ToolboxDetailPage.qml
index f7c329a67b..cf4bfcd545 100644
--- a/plugins/Toolbox/resources/qml/ToolboxDetailPage.qml
+++ b/plugins/Toolbox/resources/qml/ToolboxDetailPage.qml
@@ -9,21 +9,9 @@ import UM 1.1 as UM
 Item
 {
     id: page
-    property var details: base.selection || dummy_details
+    property var details: base.selection
     anchors.fill: parent
     width: parent.width
-
-    property var dummy_details: new Object({
-        name: '',
-        version: '',
-        last_updated: '',
-        author_email: '',
-        author_name: '',
-        website: '',
-        icon_url: '',
-        download_count: ''
-    })
-
     ToolboxBackColumn
     {
         id: sidebar
@@ -86,6 +74,7 @@ Item
             }
             spacing: Math.floor(UM.Theme.getSize("narrow_margin").height)
             width: childrenRect.width
+            height: childrenRect.height
             Label
             {
                 text: catalog.i18nc("@label", "Version") + ":"
@@ -122,6 +111,7 @@ Item
                 topMargin: UM.Theme.getSize("default_margin").height
             }
             spacing: Math.floor(UM.Theme.getSize("narrow_margin").height)
+            height: childrenRect.height
             Label
             {
                 text: details.version || catalog.i18nc("@label", "Unknown")
diff --git a/plugins/Toolbox/resources/qml/ToolboxDownloadsGrid.qml b/plugins/Toolbox/resources/qml/ToolboxDownloadsGrid.qml
index 06a6ba30fb..823a85cf09 100644
--- a/plugins/Toolbox/resources/qml/ToolboxDownloadsGrid.qml
+++ b/plugins/Toolbox/resources/qml/ToolboxDownloadsGrid.qml
@@ -25,7 +25,7 @@ Column
     {
         id: grid
         property var model: toolbox.viewCategory == "material" ? toolbox.authorsModel : toolbox.packagesModel
-        width: parent.width
+        width: parent.width - 2 * parent.padding
         columns: 2
         columnSpacing: UM.Theme.getSize("default_margin").height
         rowSpacing: UM.Theme.getSize("default_margin").width
diff --git a/plugins/Toolbox/resources/qml/ToolboxFooter.qml b/plugins/Toolbox/resources/qml/ToolboxFooter.qml
index 980ac5f8c9..5c2a6577ad 100644
--- a/plugins/Toolbox/resources/qml/ToolboxFooter.qml
+++ b/plugins/Toolbox/resources/qml/ToolboxFooter.qml
@@ -15,6 +15,7 @@ Item
     Label
     {
         text: catalog.i18nc("@info", "You will need to restart Cura before changes in packages have effect.")
+        color: UM.Theme.getColor("text")
         height: Math.floor(UM.Theme.getSize("toolbox_footer_button").height)
         verticalAlignment: Text.AlignVCenter
         anchors
@@ -25,6 +26,7 @@ Item
             right: restartButton.right
             rightMargin: UM.Theme.getSize("default_margin").width
         }
+     
     }
     Button
     {
diff --git a/resources/definitions/101Hero.def.json b/resources/definitions/101Hero.def.json
index a3ce3354af..d77f01fd82 100644
--- a/resources/definitions/101Hero.def.json
+++ b/resources/definitions/101Hero.def.json
@@ -24,7 +24,6 @@
         "machine_depth": { "default_value": 149.86 },
         "machine_height": { "default_value": 99.822 },
         "machine_center_is_zero": { "default_value": true },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "machine_head_with_fans_polygon": {
             "default_value": [
                 [ 0, 0 ],
diff --git a/resources/definitions/3dator.def.json b/resources/definitions/3dator.def.json
index 91d058cd4e..91f261906b 100644
--- a/resources/definitions/3dator.def.json
+++ b/resources/definitions/3dator.def.json
@@ -18,7 +18,6 @@
 
     "overrides": {
         "machine_name": { "default_value": "3Dator" },
-        "machine_nozzle_size": { "default_value": 0.5 },
         "speed_travel": { "default_value": 120 },
         "prime_tower_size": { "default_value": 8.660254037844387 },
         "infill_sparse_density": { "default_value": 20 },
diff --git a/resources/definitions/alya3dp.def.json b/resources/definitions/alya3dp.def.json
index f51edfe06d..e918649097 100644
--- a/resources/definitions/alya3dp.def.json
+++ b/resources/definitions/alya3dp.def.json
@@ -26,9 +26,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_polygon": {
             "default_value": [
                 [75, 18],
diff --git a/resources/definitions/anycubic_i3_mega.def.json b/resources/definitions/anycubic_i3_mega.def.json
index f20fb68da2..a6c1567dc4 100644
--- a/resources/definitions/anycubic_i3_mega.def.json
+++ b/resources/definitions/anycubic_i3_mega.def.json
@@ -45,10 +45,6 @@
         {
             "default_value": false
         },
-        "machine_nozzle_size":
-        {
-            "default_value": 0.4
-        },
         "gantry_height":
         {
             "default_value": 0
diff --git a/resources/definitions/bfb.def.json b/resources/definitions/bfb.def.json
index aa183f9c0a..d1dfa9ef1b 100644
--- a/resources/definitions/bfb.def.json
+++ b/resources/definitions/bfb.def.json
@@ -21,7 +21,6 @@
         "prime_tower_size": { "default_value": 7.745966692414834 },
         "machine_name": { "default_value": "BFB_Test" },
         "machine_heated_bed": { "default_value": false },
-        "machine_nozzle_size": { "default_value": 0.5 },
         "speed_layer_0": { "default_value": 25 },
         "machine_width": { "default_value": 275 },
         "machine_gcode_flavor": { "default_value": "BFB" },
diff --git a/resources/definitions/creality_cr10.def.json b/resources/definitions/creality_cr10.def.json
index 9fbceec9aa..b727834db3 100644
--- a/resources/definitions/creality_cr10.def.json
+++ b/resources/definitions/creality_cr10.def.json
@@ -31,9 +31,6 @@
                 [30, 34]
             ]
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "layer_height_0": {
             "default_value": 0.2
         },
diff --git a/resources/definitions/dagoma_discoeasy200.def.json b/resources/definitions/dagoma_discoeasy200.def.json
index 9ee4707ff1..bf1e43ccea 100644
--- a/resources/definitions/dagoma_discoeasy200.def.json
+++ b/resources/definitions/dagoma_discoeasy200.def.json
@@ -27,9 +27,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_with_fans_polygon": {
             "default_value": [
                 [17, 70],
diff --git a/resources/definitions/dagoma_neva.def.json b/resources/definitions/dagoma_neva.def.json
index c95b2c3103..fd747dce1c 100644
--- a/resources/definitions/dagoma_neva.def.json
+++ b/resources/definitions/dagoma_neva.def.json
@@ -28,9 +28,6 @@
         "machine_center_is_zero": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_with_fans_polygon": {
             "default_value": [
                 [17, 40],
diff --git a/resources/definitions/deltabot.def.json b/resources/definitions/deltabot.def.json
index 1746eef920..95435f659d 100644
--- a/resources/definitions/deltabot.def.json
+++ b/resources/definitions/deltabot.def.json
@@ -22,7 +22,6 @@
         "speed_wall_0": { "default_value": 30 },
         "speed_topbottom": { "default_value": 30 },
         "layer_height": { "default_value": 0.2 },
-        "machine_nozzle_size": { "default_value": 0.5 },
         "speed_print": { "default_value": 30 },
         "speed_infill": { "default_value": 30 },
         "machine_extruder_count": { "default_value": 1 },
diff --git a/resources/definitions/deltacomb.def.json b/resources/definitions/deltacomb.def.json
index c678571c57..f1114583c0 100644
--- a/resources/definitions/deltacomb.def.json
+++ b/resources/definitions/deltacomb.def.json
@@ -23,7 +23,6 @@
         "machine_height":                        { "default_value": 250 },
         "machine_depth":                         { "default_value": 190 },
         "machine_center_is_zero":                { "default_value": true },
-        "machine_nozzle_size":                   { "default_value": 0.4 },
         "machine_gcode_flavor":                  { "default_value": "RepRap (Marlin/Sprinter)" },
         "machine_start_gcode":                   { "default_value": "G21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG28 ;Home all axes (max endstops)\nG1 Z15.0 F9000 ;move the platform down 15mm\nG92 E0 ;zero the extruded length\nG1 F200 E3 ;extrude 3mm of feed stock\nG92 E0 ;zero the extruded length again\nG1 F9000\n;Put printing message on LCD screen\nM117 Printing..."},
         "machine_end_gcode":                     { "default_value": "M104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nG91 ;relative positioning\nG1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG28 ;Home all axes (max endstops)\nM84 ;steppers off\nG90 ;absolute positioning" },
diff --git a/resources/definitions/easyarts_ares.def.json b/resources/definitions/easyarts_ares.def.json
index 4f1d63b346..5655d0a795 100644
--- a/resources/definitions/easyarts_ares.def.json
+++ b/resources/definitions/easyarts_ares.def.json
@@ -52,9 +52,6 @@
         "bottom_thickness": {
             "default_value": 1
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "speed_print": {
             "default_value": 75
         },
diff --git a/resources/definitions/fabtotum.def.json b/resources/definitions/fabtotum.def.json
index 0b9b768866..1908e42913 100644
--- a/resources/definitions/fabtotum.def.json
+++ b/resources/definitions/fabtotum.def.json
@@ -35,7 +35,6 @@
         "machine_depth": { "default_value": 234 },
         "machine_center_is_zero": { "default_value": false },
         "machine_heated_bed": {	"default_value": true },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "machine_head_with_fans_polygon": { "default_value": [[-75, 35], [-75, -18], [18, 35], [18, -18]] },
         "machine_gcode_flavor": { "default_value": "RepRap (Marlin/Sprinter)" },
         "machine_max_feedrate_x": { "default_value": 250 },
diff --git a/resources/definitions/felixtec4dual.def.json b/resources/definitions/felixtec4dual.def.json
index b56601a531..ba612d4e3c 100644
--- a/resources/definitions/felixtec4dual.def.json
+++ b/resources/definitions/felixtec4dual.def.json
@@ -44,7 +44,6 @@
         "retraction_amount": { "default_value": 1 },
         "retraction_speed": { "default_value": 50},
         "material_flow": { "default_value": 87 },
-        "machine_nozzle_size": { "default_value": 0.35 },
         "adhesion_type": { "default_value": "skirt" },
         "skirt_brim_minimal_length": { "default_value": 130},
 
diff --git a/resources/definitions/gmax15plus.def.json b/resources/definitions/gmax15plus.def.json
index d112c62fe8..16695714f4 100644
--- a/resources/definitions/gmax15plus.def.json
+++ b/resources/definitions/gmax15plus.def.json
@@ -27,7 +27,6 @@
         "machine_depth": { "default_value": 406 },
         "machine_height": { "default_value": 533 },
         "machine_center_is_zero": { "default_value": false },
-        "machine_nozzle_size": { "default_value": 0.5 },
         "layer_height": { "default_value": 0.2 },
         "layer_height_0": { "default_value": 0.3 },
         "retraction_amount": { "default_value": 1 },
diff --git a/resources/definitions/gmax15plus_dual.def.json b/resources/definitions/gmax15plus_dual.def.json
index 6b70dd2eb1..5972061933 100644
--- a/resources/definitions/gmax15plus_dual.def.json
+++ b/resources/definitions/gmax15plus_dual.def.json
@@ -28,7 +28,6 @@
         "machine_depth": { "default_value": 406 },
         "machine_height": { "default_value": 533 },
         "machine_center_is_zero": { "default_value": false },
-        "machine_nozzle_size": { "default_value": 0.5 },
         "layer_height": { "default_value": 0.2 },
         "layer_height_0": { "default_value": 0.3 },
         "retraction_amount": { "default_value": 1 },
diff --git a/resources/definitions/grr_neo.def.json b/resources/definitions/grr_neo.def.json
index 374fae2202..0153fc4c01 100644
--- a/resources/definitions/grr_neo.def.json
+++ b/resources/definitions/grr_neo.def.json
@@ -29,9 +29,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.5
-        },
         "machine_head_polygon": {
             "default_value": [
                 [-75, -18],
diff --git a/resources/definitions/imade3d_jellybox.def.json b/resources/definitions/imade3d_jellybox.def.json
index 1fcea7620a..ae9ca176f5 100644
--- a/resources/definitions/imade3d_jellybox.def.json
+++ b/resources/definitions/imade3d_jellybox.def.json
@@ -26,7 +26,6 @@
         "machine_width": { "default_value": 170 },
         "machine_height": { "default_value": 145 },
         "machine_depth": { "default_value": 160 },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "machine_heated_bed": { "default_value": true },
         "machine_center_is_zero": { "default_value": false },
         "machine_gcode_flavor": { "default_value": "RepRap (Marlin/Sprinter)" },
diff --git a/resources/definitions/innovo_inventor.def.json b/resources/definitions/innovo_inventor.def.json
index 8b14e9a73f..91a6d8365b 100644
--- a/resources/definitions/innovo_inventor.def.json
+++ b/resources/definitions/innovo_inventor.def.json
@@ -32,9 +32,6 @@
         "machine_center_is_zero": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_polygon": {
             "default_value": [
                 [-43.7, -19.2],
diff --git a/resources/definitions/kemiq_q2_beta.def.json b/resources/definitions/kemiq_q2_beta.def.json
index 1a4bac233b..387818565e 100644
--- a/resources/definitions/kemiq_q2_beta.def.json
+++ b/resources/definitions/kemiq_q2_beta.def.json
@@ -34,9 +34,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_nozzle_heat_up_speed": {
             "default_value": 2
         },
diff --git a/resources/definitions/kemiq_q2_gama.def.json b/resources/definitions/kemiq_q2_gama.def.json
index 341efaa7c5..fd6f2d54aa 100644
--- a/resources/definitions/kemiq_q2_gama.def.json
+++ b/resources/definitions/kemiq_q2_gama.def.json
@@ -35,9 +35,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_nozzle_heat_up_speed": {
             "default_value": 2
         },
diff --git a/resources/definitions/kossel_mini.def.json b/resources/definitions/kossel_mini.def.json
index b4b2e5b78f..76fe72dac1 100644
--- a/resources/definitions/kossel_mini.def.json
+++ b/resources/definitions/kossel_mini.def.json
@@ -32,9 +32,6 @@
         "machine_center_is_zero": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_gcode_flavor": {
             "default_value": "RepRap (Marlin/Sprinter)"
         },
diff --git a/resources/definitions/kossel_pro.def.json b/resources/definitions/kossel_pro.def.json
index c966a9ff65..9fadd0db91 100644
--- a/resources/definitions/kossel_pro.def.json
+++ b/resources/definitions/kossel_pro.def.json
@@ -31,9 +31,6 @@
         "machine_center_is_zero": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.35
-        },
         "machine_gcode_flavor": {
             "default_value": "RepRap (Marlin/Sprinter)"
         },
diff --git a/resources/definitions/makeR_pegasus.def.json b/resources/definitions/makeR_pegasus.def.json
index 68cad7f7b9..9bd4547c9b 100644
--- a/resources/definitions/makeR_pegasus.def.json
+++ b/resources/definitions/makeR_pegasus.def.json
@@ -33,9 +33,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_polygon": {
             "default_value": [
                 [-75, -18],
diff --git a/resources/definitions/makeR_prusa_tairona_i3.def.json b/resources/definitions/makeR_prusa_tairona_i3.def.json
index 6cf0e40619..d22af5c516 100644
--- a/resources/definitions/makeR_prusa_tairona_i3.def.json
+++ b/resources/definitions/makeR_prusa_tairona_i3.def.json
@@ -33,9 +33,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_polygon": {
             "default_value": [
                 [-75, -18],
diff --git a/resources/definitions/makeit_pro_l.def.json b/resources/definitions/makeit_pro_l.def.json
index 41b351b47a..2f9173c90e 100644
--- a/resources/definitions/makeit_pro_l.def.json
+++ b/resources/definitions/makeit_pro_l.def.json
@@ -30,9 +30,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_with_fans_polygon":
         {
             "default_value": [
diff --git a/resources/definitions/makeit_pro_m.def.json b/resources/definitions/makeit_pro_m.def.json
index 798bb03318..0cd7b42df3 100644
--- a/resources/definitions/makeit_pro_m.def.json
+++ b/resources/definitions/makeit_pro_m.def.json
@@ -30,9 +30,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_with_fans_polygon":
         {
             "default_value": [
diff --git a/resources/definitions/maker_starter.def.json b/resources/definitions/maker_starter.def.json
index 333dd6c8bf..8fb67623ed 100644
--- a/resources/definitions/maker_starter.def.json
+++ b/resources/definitions/maker_starter.def.json
@@ -33,9 +33,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "gantry_height": {
             "default_value": 55
         },
diff --git a/resources/definitions/malyan_m180.def.json b/resources/definitions/malyan_m180.def.json
index 65e573cdb3..53864dabae 100644
--- a/resources/definitions/malyan_m180.def.json
+++ b/resources/definitions/malyan_m180.def.json
@@ -29,9 +29,6 @@
         "machine_center_is_zero": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_with_fans_polygon": {
             "default_value": [
                 [ -75, 35 ],
diff --git a/resources/definitions/malyan_m200.def.json b/resources/definitions/malyan_m200.def.json
index df852273f6..b3b0651e1a 100644
--- a/resources/definitions/malyan_m200.def.json
+++ b/resources/definitions/malyan_m200.def.json
@@ -60,10 +60,6 @@
         "machine_height": { "default_value": 120 },
         "machine_heated_bed": { "default_value": true },
         "machine_center_is_zero": { "default_value": false },
-        "machine_nozzle_size": {
-            "default_value": 0.4,
-            "minimum_value": 0.15
-        },
         "machine_max_feedrate_x": { "default_value": 150 },
         "machine_max_feedrate_y": { "default_value": 150 },
         "machine_max_feedrate_z": { "default_value": 1.5 },
diff --git a/resources/definitions/mankati_fullscale_xt_plus.def.json b/resources/definitions/mankati_fullscale_xt_plus.def.json
index bf21eb17ca..507e5209b2 100644
--- a/resources/definitions/mankati_fullscale_xt_plus.def.json
+++ b/resources/definitions/mankati_fullscale_xt_plus.def.json
@@ -20,7 +20,6 @@
         "machine_height": { "default_value": 300 },
         "machine_heated_bed": { "default_value": true },
 
-        "machine_nozzle_size": { "default_value": 0.4 },
         "machine_head_with_fans_polygon": {
             "default_value": [
                 [ -3,  3 ],
diff --git a/resources/definitions/mendel90.def.json b/resources/definitions/mendel90.def.json
index 6974ae5bf7..104ca7f42f 100644
--- a/resources/definitions/mendel90.def.json
+++ b/resources/definitions/mendel90.def.json
@@ -70,9 +70,6 @@
         "gantry_height": {
             "default_value": 55
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_with_fans_polygon":
         {
             "default_value": [
diff --git a/resources/definitions/ord.def.json b/resources/definitions/ord.def.json
index c589114fb6..de410b0d58 100644
--- a/resources/definitions/ord.def.json
+++ b/resources/definitions/ord.def.json
@@ -24,7 +24,6 @@
         "infill_sparse_density": { "default_value": 15 },
         "speed_travel": { "default_value": 150 },
         "layer_height": { "default_value": 0.3 },
-        "machine_nozzle_size": { "default_value": 0.35 },
         "material_print_temperature": { "default_value": 240 },
         "machine_extruder_count": { "default_value": 5 },
         "machine_heated_bed": { "default_value": true },
diff --git a/resources/definitions/peopoly_moai.def.json b/resources/definitions/peopoly_moai.def.json
index 1a31257523..5c03444d49 100644
--- a/resources/definitions/peopoly_moai.def.json
+++ b/resources/definitions/peopoly_moai.def.json
@@ -28,9 +28,6 @@
         "machine_depth": {
             "default_value": 130
         },
-        "machine_nozzle_size": {
-            "default_value": 0.067
-        },
         "machine_head_with_fans_polygon":
         {
             "default_value": [
diff --git a/resources/definitions/printrbot_play.def.json b/resources/definitions/printrbot_play.def.json
index 990f5b9080..e3a18a4eee 100644
--- a/resources/definitions/printrbot_play.def.json
+++ b/resources/definitions/printrbot_play.def.json
@@ -21,7 +21,6 @@
         "machine_depth": { "default_value": 100 },
         "machine_height": { "default_value": 130 },
         "machine_center_is_zero": { "default_value": false },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "layer_height": { "default_value": 0.2 },
         "layer_height_0": { "default_value": 0.3 },
         "retraction_amount": { "default_value": 0.7 },
diff --git a/resources/definitions/printrbot_simple.def.json b/resources/definitions/printrbot_simple.def.json
index b20168deff..fb65b77fa5 100644
--- a/resources/definitions/printrbot_simple.def.json
+++ b/resources/definitions/printrbot_simple.def.json
@@ -22,7 +22,6 @@
         "machine_height": { "default_value": 150 },
         "machine_depth": { "default_value": 140 },
         "machine_center_is_zero": { "default_value": false },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "machine_head_with_fans_polygon": {
             "default_value": [
                 [-49, 20],
diff --git a/resources/definitions/printrbot_simple_extended.def.json b/resources/definitions/printrbot_simple_extended.def.json
index 02c58171c1..1e004a8ca3 100644
--- a/resources/definitions/printrbot_simple_extended.def.json
+++ b/resources/definitions/printrbot_simple_extended.def.json
@@ -22,7 +22,6 @@
         "machine_height": { "default_value": 235 },
         "machine_depth": { "default_value": 150 },
         "machine_center_is_zero": { "default_value": false },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "machine_head_with_fans_polygon": {
             "default_value": [
                 [ 55, -20 ],
diff --git a/resources/definitions/printrbot_simple_makers_kit.def.json b/resources/definitions/printrbot_simple_makers_kit.def.json
index 001ee887f3..ad6ecee21e 100644
--- a/resources/definitions/printrbot_simple_makers_kit.def.json
+++ b/resources/definitions/printrbot_simple_makers_kit.def.json
@@ -19,7 +19,6 @@
         "machine_width": { "default_value": 100 },
         "machine_depth": { "default_value": 100 },
         "machine_height": { "default_value": 115 },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "machine_head_with_fans_polygon": {
             "default_value": [
                 [-40, 1000],
diff --git a/resources/definitions/prusa_i3.def.json b/resources/definitions/prusa_i3.def.json
index 603b2822f0..a3759eb6c0 100644
--- a/resources/definitions/prusa_i3.def.json
+++ b/resources/definitions/prusa_i3.def.json
@@ -32,9 +32,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_polygon": {
             "default_value": [
                 [-75, -18],
diff --git a/resources/definitions/prusa_i3_mk2.def.json b/resources/definitions/prusa_i3_mk2.def.json
index 033fbc6a48..169eb6ffc2 100644
--- a/resources/definitions/prusa_i3_mk2.def.json
+++ b/resources/definitions/prusa_i3_mk2.def.json
@@ -24,7 +24,6 @@
         "machine_depth": { "default_value": 210 },
         "machine_center_is_zero": { "default_value": false },
         "material_bed_temperature": { "default_value": 55 },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "layer_height": { "default_value": 0.1 },
         "layer_height_0": { "default_value": 0.15 },
         "retraction_amount": { "default_value": 0.8 },
diff --git a/resources/definitions/prusa_i3_xl.def.json b/resources/definitions/prusa_i3_xl.def.json
index b1233f6df7..eafed22df1 100644
--- a/resources/definitions/prusa_i3_xl.def.json
+++ b/resources/definitions/prusa_i3_xl.def.json
@@ -32,9 +32,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_polygon": {
             "default_value": [
                 [-75, -18],
diff --git a/resources/definitions/raise3D_N2_dual.def.json b/resources/definitions/raise3D_N2_dual.def.json
index ea5a998a5a..eff5884da8 100644
--- a/resources/definitions/raise3D_N2_dual.def.json
+++ b/resources/definitions/raise3D_N2_dual.def.json
@@ -33,9 +33,6 @@
         "machine_heated_bed": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_nozzle_heat_up_speed": {
             "default_value": 6
         },
diff --git a/resources/definitions/raise3D_N2_plus_dual.def.json b/resources/definitions/raise3D_N2_plus_dual.def.json
index 78a91d0f96..06de52321a 100644
--- a/resources/definitions/raise3D_N2_plus_dual.def.json
+++ b/resources/definitions/raise3D_N2_plus_dual.def.json
@@ -33,9 +33,6 @@
         "machine_heated_bed": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_nozzle_heat_up_speed": {
             "default_value": 6
         },
diff --git a/resources/definitions/raise3D_N2_plus_single.def.json b/resources/definitions/raise3D_N2_plus_single.def.json
index 25a263ab5f..55b8c9c8c5 100644
--- a/resources/definitions/raise3D_N2_plus_single.def.json
+++ b/resources/definitions/raise3D_N2_plus_single.def.json
@@ -32,9 +32,6 @@
         "machine_heated_bed": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_nozzle_heat_up_speed": {
             "default_value": 6
         },
diff --git a/resources/definitions/raise3D_N2_single.def.json b/resources/definitions/raise3D_N2_single.def.json
index 62b756b7da..899da5188f 100644
--- a/resources/definitions/raise3D_N2_single.def.json
+++ b/resources/definitions/raise3D_N2_single.def.json
@@ -32,9 +32,6 @@
         "machine_heated_bed": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_nozzle_heat_up_speed": {
             "default_value": 6
         },
diff --git a/resources/definitions/rigid3d_mucit.def.json b/resources/definitions/rigid3d_mucit.def.json
index 9f1ac294e5..42cd99a3bd 100644
--- a/resources/definitions/rigid3d_mucit.def.json
+++ b/resources/definitions/rigid3d_mucit.def.json
@@ -69,9 +69,6 @@
         "machine_depth": {
             "default_value": 150
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_gcode_flavor": {
             "default_value": "RepRap"
         },
diff --git a/resources/definitions/rigid3d_zero2.def.json b/resources/definitions/rigid3d_zero2.def.json
index 7d49ccc72f..09390ed8b5 100644
--- a/resources/definitions/rigid3d_zero2.def.json
+++ b/resources/definitions/rigid3d_zero2.def.json
@@ -80,9 +80,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "gantry_height": {
             "default_value": 25
         },
diff --git a/resources/definitions/rigidbot_big.def.json b/resources/definitions/rigidbot_big.def.json
index 5128408b15..581b6144a0 100644
--- a/resources/definitions/rigidbot_big.def.json
+++ b/resources/definitions/rigidbot_big.def.json
@@ -28,9 +28,6 @@
         "machine_heated_bed": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "gantry_height": {
             "default_value": 0
         },
diff --git a/resources/definitions/seemecnc_artemis.def.json b/resources/definitions/seemecnc_artemis.def.json
index 731fec5975..aa788865df 100644
--- a/resources/definitions/seemecnc_artemis.def.json
+++ b/resources/definitions/seemecnc_artemis.def.json
@@ -26,7 +26,6 @@
         "machine_height": { "default_value": 530 },
         "machine_max_feedrate_z": { "default_value": 400 },
         "machine_name": { "default_value": "Artemis" },
-        "machine_nozzle_size": { "default_value": 0.5 },
         "machine_shape": { "default_value": "elliptic" },
         "machine_width": { "default_value": 290 },
         "relative_extrusion": { "default_value": false },
diff --git a/resources/definitions/seemecnc_v32.def.json b/resources/definitions/seemecnc_v32.def.json
index 6580ee0172..5a855f67fc 100644
--- a/resources/definitions/seemecnc_v32.def.json
+++ b/resources/definitions/seemecnc_v32.def.json
@@ -26,7 +26,6 @@
         "machine_height": { "default_value": 395 },
         "machine_max_feedrate_z": { "default_value": 300 },
         "machine_name": { "default_value": "Rostock Max V3.2" },
-        "machine_nozzle_size": { "default_value": 0.5 },
         "machine_shape": { "default_value": "elliptic" },
         "machine_width": { "default_value": 265 },
         "relative_extrusion": { "default_value": false },
diff --git a/resources/definitions/tevo_blackwidow.def.json b/resources/definitions/tevo_blackwidow.def.json
index dc4feae6f9..b193023867 100644
--- a/resources/definitions/tevo_blackwidow.def.json
+++ b/resources/definitions/tevo_blackwidow.def.json
@@ -43,10 +43,6 @@
         {
             "default_value": false
         },
-        "machine_nozzle_size":
-        {
-            "default_value": 0.4
-        },
         "gantry_height":
         {
             "default_value": 0
diff --git a/resources/definitions/tevo_tarantula.def.json b/resources/definitions/tevo_tarantula.def.json
index 6953dab63a..40d579552e 100644
--- a/resources/definitions/tevo_tarantula.def.json
+++ b/resources/definitions/tevo_tarantula.def.json
@@ -24,7 +24,6 @@
         "machine_height": { "default_value": 200 },
         "machine_depth": { "default_value": 200 },
         "machine_center_is_zero": { "default_value": false },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "machine_head_polygon":
         {
             "default_value":
diff --git a/resources/definitions/tevo_tornado.def.json b/resources/definitions/tevo_tornado.def.json
index 7ec4f1177f..e121c8e097 100644
--- a/resources/definitions/tevo_tornado.def.json
+++ b/resources/definitions/tevo_tornado.def.json
@@ -8,7 +8,10 @@
         "manufacturer": "Tevo",
         "file_formats": "text/x-gcode",
         "icon": "icon_ultimaker2.png",
-        "has_materials": true
+        "has_materials": true,
+        "machine_extruder_trains": {
+            "0": "tevo_tornado_extruder_0"
+        }
     },
     "overrides": {
         "machine_name": { 
@@ -34,12 +37,6 @@
                 [30, 34]
             ]
         },
-        "material_diameter": {
-            "default_value": 1.75
-        },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "top_bottom_thickness": {
             "default_value": 1.2
         },
diff --git a/resources/definitions/ubuild-3d_mr_bot_280.def.json b/resources/definitions/ubuild-3d_mr_bot_280.def.json
index 768c261785..1b5cb1456c 100644
--- a/resources/definitions/ubuild-3d_mr_bot_280.def.json
+++ b/resources/definitions/ubuild-3d_mr_bot_280.def.json
@@ -27,7 +27,6 @@
         "machine_depth": { "default_value": 275 },
         "machine_center_is_zero": { "default_value": false },
         "material_bed_temperature": { "default_value": 70 },
-        "machine_nozzle_size": { "default_value": 0.4 },
         "layer_height_0": { "default_value": 0.1 },
         "retraction_amount": { "default_value": 2 },
         "retraction_speed": { "default_value": 50 },
diff --git a/resources/definitions/ultimaker2.def.json b/resources/definitions/ultimaker2.def.json
index 9de5d9aab9..aa684946c2 100644
--- a/resources/definitions/ultimaker2.def.json
+++ b/resources/definitions/ultimaker2.def.json
@@ -54,10 +54,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4,
-            "minimum_value": "0.001"
-        },
         "gantry_height": {
             "default_value": 48
         },
diff --git a/resources/definitions/ultimaker_original.def.json b/resources/definitions/ultimaker_original.def.json
index d2418df6b9..c961423504 100644
--- a/resources/definitions/ultimaker_original.def.json
+++ b/resources/definitions/ultimaker_original.def.json
@@ -35,9 +35,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_with_fans_polygon":
         {
             "default_value": [
diff --git a/resources/definitions/ultimaker_original_dual.def.json b/resources/definitions/ultimaker_original_dual.def.json
index 1ce15f7dc6..55eddba85f 100644
--- a/resources/definitions/ultimaker_original_dual.def.json
+++ b/resources/definitions/ultimaker_original_dual.def.json
@@ -37,9 +37,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.4
-        },
         "machine_head_with_fans_polygon":
         {
             "default_value": [
diff --git a/resources/definitions/uni_print_3d.def.json b/resources/definitions/uni_print_3d.def.json
index 1241e2b601..1612c1bf80 100644
--- a/resources/definitions/uni_print_3d.def.json
+++ b/resources/definitions/uni_print_3d.def.json
@@ -11,7 +11,10 @@
         "manufacturer": "TheCoolTool",
         "file_formats": "text/x-ngc;text/x-gcode",
         "platform": "uni_print_3d_platform.stl",
-        "platform_offset": [0, 0, 0]
+        "platform_offset": [0, 0, 0],
+        "machine_extruder_trains": {
+            "0": "uni_print_3d_extruder_0"
+        }
     },
 
     "overrides": {
@@ -21,8 +24,6 @@
         "machine_height": { "default_value": 230 },
         "machine_depth": { "default_value": 220 },
         "machine_center_is_zero": { "default_value": true },
-        "machine_nozzle_size": { "default_value": 0.4 },
-        "material_diameter": { "default_value": 1.75 },
         "machine_nozzle_heat_up_speed": { "default_value": 2.0 },
         "machine_nozzle_cool_down_speed": { "default_value": 2.0 },
         "machine_head_shape_min_x": { "default_value": 75 },
diff --git a/resources/definitions/uniqbot_one.def.json b/resources/definitions/uniqbot_one.def.json
index b277e78925..396e9687b8 100644
--- a/resources/definitions/uniqbot_one.def.json
+++ b/resources/definitions/uniqbot_one.def.json
@@ -30,9 +30,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.5
-        },
         "gantry_height": {
             "default_value": 55
         },
diff --git a/resources/definitions/vertex_delta_k8800.def.json b/resources/definitions/vertex_delta_k8800.def.json
index 9add22b902..7059c2e7f0 100644
--- a/resources/definitions/vertex_delta_k8800.def.json
+++ b/resources/definitions/vertex_delta_k8800.def.json
@@ -30,9 +30,6 @@
     "machine_shape": {
       "default_value": "elliptic"
     },
-    "machine_nozzle_size": {
-      "default_value": 0.35
-    },
     "machine_head_shape_min_x": {
       "default_value": 0
     },
diff --git a/resources/definitions/vertex_k8400.def.json b/resources/definitions/vertex_k8400.def.json
index 42d94e7723..0166729951 100644
--- a/resources/definitions/vertex_k8400.def.json
+++ b/resources/definitions/vertex_k8400.def.json
@@ -42,9 +42,6 @@
         "machine_center_is_zero": {
             "default_value": false
         },
-        "machine_nozzle_size": {
-            "default_value": 0.35
-        },
         "machine_head_polygon": {
             "default_value": [
                 [-60, -18],
diff --git a/resources/definitions/vertex_k8400_dual.def.json b/resources/definitions/vertex_k8400_dual.def.json
index f5c5668390..b22dabaa94 100644
--- a/resources/definitions/vertex_k8400_dual.def.json
+++ b/resources/definitions/vertex_k8400_dual.def.json
@@ -43,9 +43,6 @@
         "machine_use_extruder_offset_to_offset_coords": {
             "default_value": true
         },
-        "machine_nozzle_size": {
-            "default_value": 0.35
-        },
         "machine_head_polygon": {
             "default_value": [
                 [-60, -18],
diff --git a/resources/definitions/wanhao_d4s.def.json b/resources/definitions/wanhao_d4s.def.json
index b7cd52a500..1ae16a9d56 100644
--- a/resources/definitions/wanhao_d4s.def.json
+++ b/resources/definitions/wanhao_d4s.def.json
@@ -11,6 +11,9 @@
     "has_materials": true,
     "platform": "wanhao_225_145_platform.obj",
     "platform_texture": "Wanhaobackplate.png",
+    "machine_extruder_trains": {
+        "0": "wanhao_d4s_extruder_0"
+    },
     "platform_offset": [
       0,
       -28,
@@ -33,9 +36,6 @@
     "machine_heated_bed": {
       "default_value": true
     },
-    "machine_nozzle_size": {
-      "default_value": 0.4
-    },
     "machine_gcode_flavor": {
       "default_value": "RepRap (Marlin/Sprinter)"
     },
@@ -44,9 +44,6 @@
     },
     "machine_end_gcode": {
       "default_value": "M104 S0 ;extruder heater off \n G91 ;relative positioning\n G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\n G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more\n G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\n M84 ;steppers off\n G90 ;absolute positioning"
-    },
-    "material_diameter": {
-      "default_value": 1.75
     }
   }
 }
diff --git a/resources/definitions/wanhao_d6.def.json b/resources/definitions/wanhao_d6.def.json
index 23ea069c7a..6164f4d016 100644
--- a/resources/definitions/wanhao_d6.def.json
+++ b/resources/definitions/wanhao_d6.def.json
@@ -11,6 +11,9 @@
     "has_materials": true,
     "platform": "wanhao_200_200_platform.obj",
     "platform_texture": "Wanhaobackplate.png",
+    "machine_extruder_trains": {
+        "0": "wanhao_d6_extruder_0"
+    },
     "platform_offset": [
       0,
       -28,
@@ -33,9 +36,6 @@
     "machine_depth": {
       "default_value": 200
     },
-    "machine_nozzle_size": {
-      "default_value": 0.4
-    },
     "machine_heated_bed": {
       "default_value": true
     },
@@ -50,9 +50,6 @@
     },
     "machine_end_gcode": {
       "default_value": "M104 S0 ;extruder heater off \n G91 ;relative positioning\n G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\n G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more\n G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\n M84 ;steppers off\n G90 ;absolute positioning"
-    },
-    "material_diameter": {
-      "default_value": 1.75
     }
   }
 }
diff --git a/resources/definitions/wanhao_d6_plus.def.json b/resources/definitions/wanhao_d6_plus.def.json
index 9fd03561e1..04cb6fae9f 100644
--- a/resources/definitions/wanhao_d6_plus.def.json
+++ b/resources/definitions/wanhao_d6_plus.def.json
@@ -11,6 +11,9 @@
     "has_materials": true,
     "platform": "wanhao_200_200_platform.obj",
     "platform_texture": "Wanhaobackplate.png",
+    "machine_extruder_trains": {
+        "0": "wanhao_d6_plus_extruder_0"
+    },
     "platform_offset": [
       0,
       -28,
@@ -30,9 +33,6 @@
     "machine_depth": {
       "default_value": 200
     },
-    "machine_nozzle_size": {
-      "default_value": 0.4
-    },
     "machine_heated_bed": {
       "default_value": true
     },
@@ -44,9 +44,6 @@
     },
     "machine_end_gcode": {
       "default_value": "M104 S0 ;extruder heater off \n G91 ;relative positioning\n G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\n G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more\n G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\n M84 ;steppers off\n G90 ;absolute positioning"
-    },
-    "material_diameter": {
-      "default_value": 1.75
     }
   }
 }
diff --git a/resources/definitions/wanhao_duplicator5S.def.json b/resources/definitions/wanhao_duplicator5S.def.json
index 7ded5b0fdb..1ccc867876 100644
--- a/resources/definitions/wanhao_duplicator5S.def.json
+++ b/resources/definitions/wanhao_duplicator5S.def.json
@@ -11,6 +11,9 @@
     "has_materials": true,
     "platform": "wanhao_300_200_platform.obj",
     "platform_texture": "Wanhaobackplate.png",
+    "machine_extruder_trains": {
+        "0": "wanhao_duplicator5S_extruder_0"
+    },
     "platform_offset": [
       0,
       -28,
@@ -36,9 +39,6 @@
     "machine_heated_bed": {
       "default_value": false
     },
-    "machine_nozzle_size": {
-      "default_value": 0.4
-    },
     "machine_gcode_flavor": {
       "default_value": "RepRap (Marlin/Sprinter)"
     },
@@ -47,9 +47,6 @@
     },
     "machine_end_gcode": {
       "default_value": "M104 S0 ;extruder heater off \n G91 ;relative positioning\n G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\n G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more\n G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\n M84 ;steppers off\n G90 ;absolute positioning"
-    },
-    "material_diameter": {
-      "default_value": 3
     }
   }
 }
diff --git a/resources/definitions/wanhao_duplicator5Smini.def.json b/resources/definitions/wanhao_duplicator5Smini.def.json
index 2ab2119961..774360f41e 100644
--- a/resources/definitions/wanhao_duplicator5Smini.def.json
+++ b/resources/definitions/wanhao_duplicator5Smini.def.json
@@ -11,6 +11,9 @@
     "has_materials": true,
     "platform": "wanhao_300_200_platform.obj",
     "platform_texture": "Wanhaobackplate.png",
+    "machine_extruder_trains": {
+        "0": "wanhao_duplicator5Smini_extruder_0"
+    },
     "platform_offset": [
       0,
       -28,
@@ -33,9 +36,6 @@
     "machine_heated_bed": {
       "default_value": false
     },
-    "machine_nozzle_size": {
-      "default_value": 0.4
-    },
     "machine_gcode_flavor": {
       "default_value": "RepRap (Marlin/Sprinter)"
     },
@@ -44,9 +44,6 @@
     },
     "machine_end_gcode": {
       "default_value": "M104 S0 ;extruder heater off \n G91 ;relative positioning\n G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\n G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more\n G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\n M84 ;steppers off\n G90 ;absolute positioning"
-    },
-    "material_diameter": {
-      "default_value": 3
     }
   }
 }
diff --git a/resources/definitions/wanhao_i3.def.json b/resources/definitions/wanhao_i3.def.json
index 2171d887ef..c349259cad 100644
--- a/resources/definitions/wanhao_i3.def.json
+++ b/resources/definitions/wanhao_i3.def.json
@@ -11,6 +11,9 @@
     "has_materials": true,
     "platform": "wanhao_200_200_platform.obj",
     "platform_texture": "Wanhaobackplate.png",
+    "machine_extruder_trains": {
+        "0": "wanhao_i3_extruder_0"
+    },
     "platform_offset": [
       0,
       -28,
@@ -33,9 +36,6 @@
     "machine_heated_bed": {
       "default_value": true
     },
-    "machine_nozzle_size": {
-      "default_value": 0.4
-    },
     "machine_gcode_flavor": {
       "default_value": "RepRap (Marlin/Sprinter)"
     },
@@ -44,9 +44,6 @@
     },
     "machine_end_gcode": {
       "default_value": "M104 S0 ;extruder heater off \n G91 ;relative positioning\n G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\n G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more\n G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\n M84 ;steppers off\n G90 ;absolute positioning"
-    },
-    "material_diameter": {
-      "default_value": 1.75
     }
   }
 }
diff --git a/resources/definitions/wanhao_i3mini.def.json b/resources/definitions/wanhao_i3mini.def.json
index 0145221229..4531483459 100644
--- a/resources/definitions/wanhao_i3mini.def.json
+++ b/resources/definitions/wanhao_i3mini.def.json
@@ -11,6 +11,9 @@
     "has_materials": true,
     "platform": "wanhao_110_110_platform.obj",
     "platform_texture": "Wanhaobackplate.png",
+    "machine_extruder_trains": {
+        "0": "wanhao_i3mini_extruder_0"
+    },
     "platform_offset": [
       0,
       -15,
@@ -33,9 +36,6 @@
     "machine_heated_bed": {
       "default_value": false
     },
-    "machine_nozzle_size": {
-      "default_value": 0.4
-    },
     "machine_gcode_flavor": {
       "default_value": "RepRap (Marlin/Sprinter)"
     },
@@ -44,9 +44,6 @@
     },
     "machine_end_gcode": {
       "default_value": "M104 S0 ;extruder heater off \n G91 ;relative positioning\n G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\n G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more\n G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\n M84 ;steppers off\n G90 ;absolute positioning"
-    },
-    "material_diameter": {
-      "default_value": 1.75
     }
   }
 }
diff --git a/resources/definitions/wanhao_i3plus.def.json b/resources/definitions/wanhao_i3plus.def.json
index 83f1cf5f4e..5338fbeea2 100644
--- a/resources/definitions/wanhao_i3plus.def.json
+++ b/resources/definitions/wanhao_i3plus.def.json
@@ -11,6 +11,9 @@
     "has_materials": true,
     "platform": "wanhao_200_200_platform.obj",
     "platform_texture": "Wanhaobackplate.png",
+    "machine_extruder_trains": {
+        "0": "wanhao_i3plus_extruder_0"
+    },
     "platform_offset": [
       0,
       -28,
@@ -33,9 +36,6 @@
     "machine_heated_bed": {
       "default_value": true
     },
-    "machine_nozzle_size": {
-      "default_value": 0.4
-    },
     "machine_gcode_flavor": {
       "default_value": "RepRap (Marlin/Sprinter)"
     },
@@ -44,9 +44,6 @@
     },
     "machine_end_gcode": {
       "default_value": "M104 S0 ;extruder heater off \n G91 ;relative positioning\n G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\n G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more\n G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\n M84 ;steppers off\n G90 ;absolute positioning"
-    },
-    "material_diameter": {
-      "default_value": 1.75
     }
   }
 }
diff --git a/resources/extruders/felixtec4_dual_extruder_0.def.json b/resources/extruders/felixtec4_dual_extruder_0.def.json
index fee4cbb995..2a2d0468e1 100644
--- a/resources/extruders/felixtec4_dual_extruder_0.def.json
+++ b/resources/extruders/felixtec4_dual_extruder_0.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0 },
         "machine_nozzle_offset_y": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/felixtec4_dual_extruder_1.def.json b/resources/extruders/felixtec4_dual_extruder_1.def.json
index 2c44b41186..5d7e9c74a3 100644
--- a/resources/extruders/felixtec4_dual_extruder_1.def.json
+++ b/resources/extruders/felixtec4_dual_extruder_1.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 13 },
         "machine_nozzle_offset_y": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/makeit_dual_1st.def.json b/resources/extruders/makeit_dual_1st.def.json
index 2882054cca..0f5a716e16 100644
--- a/resources/extruders/makeit_dual_1st.def.json
+++ b/resources/extruders/makeit_dual_1st.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/makeit_dual_2nd.def.json b/resources/extruders/makeit_dual_2nd.def.json
index 24e9be3a4a..f93d670c85 100644
--- a/resources/extruders/makeit_dual_2nd.def.json
+++ b/resources/extruders/makeit_dual_2nd.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/makeit_l_dual_1st.def.json b/resources/extruders/makeit_l_dual_1st.def.json
index bf3f99bfa7..6a9e8e3fc1 100644
--- a/resources/extruders/makeit_l_dual_1st.def.json
+++ b/resources/extruders/makeit_l_dual_1st.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/makeit_l_dual_2nd.def.json b/resources/extruders/makeit_l_dual_2nd.def.json
index 3964ef6779..72b86b22e4 100644
--- a/resources/extruders/makeit_l_dual_2nd.def.json
+++ b/resources/extruders/makeit_l_dual_2nd.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/ord_extruder_0.def.json b/resources/extruders/ord_extruder_0.def.json
index f98666716d..317ad70a3c 100644
--- a/resources/extruders/ord_extruder_0.def.json
+++ b/resources/extruders/ord_extruder_0.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 }
     }
 }
diff --git a/resources/extruders/ord_extruder_1.def.json b/resources/extruders/ord_extruder_1.def.json
index 9ea08cf626..6e29ad2f2b 100644
--- a/resources/extruders/ord_extruder_1.def.json
+++ b/resources/extruders/ord_extruder_1.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 62.95 },
         "machine_nozzle_offset_y": { "default_value": 2.05 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 }
     }
 }
diff --git a/resources/extruders/ord_extruder_2.def.json b/resources/extruders/ord_extruder_2.def.json
index 1b521c7507..849930c988 100644
--- a/resources/extruders/ord_extruder_2.def.json
+++ b/resources/extruders/ord_extruder_2.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 27.7 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 }
     }
 }
diff --git a/resources/extruders/ord_extruder_3.def.json b/resources/extruders/ord_extruder_3.def.json
index bd4d0e2a61..eb3676c14f 100644
--- a/resources/extruders/ord_extruder_3.def.json
+++ b/resources/extruders/ord_extruder_3.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 63.18 },
         "machine_nozzle_offset_y": { "default_value": 28.65 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 }
     }
 }
diff --git a/resources/extruders/ord_extruder_4.def.json b/resources/extruders/ord_extruder_4.def.json
index 00635e9059..291e9e5501 100644
--- a/resources/extruders/ord_extruder_4.def.json
+++ b/resources/extruders/ord_extruder_4.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 31.6 },
         "machine_nozzle_offset_y": { "default_value": 28.2 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 }
     }
 }
diff --git a/resources/extruders/raise3D_N2_dual_extruder_0.def.json b/resources/extruders/raise3D_N2_dual_extruder_0.def.json
index b97ee19d24..48746969d3 100644
--- a/resources/extruders/raise3D_N2_dual_extruder_0.def.json
+++ b/resources/extruders/raise3D_N2_dual_extruder_0.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0 },
         "machine_nozzle_offset_y": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/raise3D_N2_dual_extruder_1.def.json b/resources/extruders/raise3D_N2_dual_extruder_1.def.json
index 28c030b28e..8ea6f95b16 100644
--- a/resources/extruders/raise3D_N2_dual_extruder_1.def.json
+++ b/resources/extruders/raise3D_N2_dual_extruder_1.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 24.8 },
         "machine_nozzle_offset_y": { "default_value": 0.6 },
+        "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/raise3D_N2_plus_dual_extruder_0.def.json b/resources/extruders/raise3D_N2_plus_dual_extruder_0.def.json
index 3905e074ae..fc7531cf1b 100644
--- a/resources/extruders/raise3D_N2_plus_dual_extruder_0.def.json
+++ b/resources/extruders/raise3D_N2_plus_dual_extruder_0.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0 },
         "machine_nozzle_offset_y": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/raise3D_N2_plus_dual_extruder_1.def.json b/resources/extruders/raise3D_N2_plus_dual_extruder_1.def.json
index 65c9fb7274..83f949bb22 100644
--- a/resources/extruders/raise3D_N2_plus_dual_extruder_1.def.json
+++ b/resources/extruders/raise3D_N2_plus_dual_extruder_1.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 24.8 },
         "machine_nozzle_offset_y": { "default_value": 0.6 },
+        "machine_nozzle_size": { "default_value": 0.4 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/raise3D_N2_plus_single_extruder_0.def.json b/resources/extruders/raise3D_N2_plus_single_extruder_0.def.json
index bb6e631864..efb071cb8c 100644
--- a/resources/extruders/raise3D_N2_plus_single_extruder_0.def.json
+++ b/resources/extruders/raise3D_N2_plus_single_extruder_0.def.json
@@ -1,5 +1,4 @@
 {
-    "id": "raise3D_N2_plus_single_extruder_0",
     "version": 2,
     "name": "Extruder 1",
     "inherits": "fdmextruder",
diff --git a/resources/extruders/tevo_tornado_extruder_0.def.json b/resources/extruders/tevo_tornado_extruder_0.def.json
new file mode 100644
index 0000000000..b47a757113
--- /dev/null
+++ b/resources/extruders/tevo_tornado_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "tevo_tornado_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "tevo_tornado",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
diff --git a/resources/extruders/ultimaker_original_dual_1st.def.json b/resources/extruders/ultimaker_original_dual_1st.def.json
index 62ec8479c9..3d837fc989 100644
--- a/resources/extruders/ultimaker_original_dual_1st.def.json
+++ b/resources/extruders/ultimaker_original_dual_1st.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
         "machine_extruder_start_pos_x": { "value": "prime_tower_position_x" },
diff --git a/resources/extruders/ultimaker_original_dual_2nd.def.json b/resources/extruders/ultimaker_original_dual_2nd.def.json
index 42a4da524b..80cc17c58d 100644
--- a/resources/extruders/ultimaker_original_dual_2nd.def.json
+++ b/resources/extruders/ultimaker_original_dual_2nd.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 21.6 },
+        "machine_nozzle_size": { "default_value": 0.4 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
         "machine_extruder_start_pos_x": { "value": "prime_tower_position_x" },
diff --git a/resources/extruders/uni_print_3d_extruder_0.def.json b/resources/extruders/uni_print_3d_extruder_0.def.json
new file mode 100644
index 0000000000..d0711fd458
--- /dev/null
+++ b/resources/extruders/uni_print_3d_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "uni_print_3d_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "uni_print_3d",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
diff --git a/resources/extruders/vertex_k8400_dual_1st.def.json b/resources/extruders/vertex_k8400_dual_1st.def.json
index 2694323f7d..86fb2266ba 100644
--- a/resources/extruders/vertex_k8400_dual_1st.def.json
+++ b/resources/extruders/vertex_k8400_dual_1st.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 23.7 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/vertex_k8400_dual_2nd.def.json b/resources/extruders/vertex_k8400_dual_2nd.def.json
index 044f7000af..306b2dcb7a 100644
--- a/resources/extruders/vertex_k8400_dual_2nd.def.json
+++ b/resources/extruders/vertex_k8400_dual_2nd.def.json
@@ -15,6 +15,7 @@
         },
         "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
+        "machine_nozzle_size": { "default_value": 0.35 },
         "material_diameter": { "default_value": 1.75 },
 
         "machine_extruder_start_pos_abs": { "default_value": true },
diff --git a/resources/extruders/wanhao_d4s_extruder_0.def.json b/resources/extruders/wanhao_d4s_extruder_0.def.json
new file mode 100644
index 0000000000..9a750e072c
--- /dev/null
+++ b/resources/extruders/wanhao_d4s_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "wanhao_d4s_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "wanhao_d4s",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
diff --git a/resources/extruders/wanhao_d6_extruder_0.def.json b/resources/extruders/wanhao_d6_extruder_0.def.json
new file mode 100644
index 0000000000..a8a3bf15d3
--- /dev/null
+++ b/resources/extruders/wanhao_d6_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "wanhao_d6_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "wanhao_d6",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
diff --git a/resources/extruders/wanhao_d6_plus_extruder_0.def.json b/resources/extruders/wanhao_d6_plus_extruder_0.def.json
new file mode 100644
index 0000000000..b2b1e6ab05
--- /dev/null
+++ b/resources/extruders/wanhao_d6_plus_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "wanhao_d6_plus_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "wanhao_d6_plus",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
diff --git a/resources/extruders/wanhao_duplicator5S_extruder_0.def.json b/resources/extruders/wanhao_duplicator5S_extruder_0.def.json
new file mode 100644
index 0000000000..74f47158a3
--- /dev/null
+++ b/resources/extruders/wanhao_duplicator5S_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "wanhao_duplicator5S_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "wanhao_duplicator5S",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 3 }
+    }
+}
diff --git a/resources/extruders/wanhao_duplicator5Smini_extruder_0.def.json b/resources/extruders/wanhao_duplicator5Smini_extruder_0.def.json
new file mode 100644
index 0000000000..8c91de4685
--- /dev/null
+++ b/resources/extruders/wanhao_duplicator5Smini_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "wanhao_duplicator5Smini_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "wanhao_duplicator5Smini",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 3 }
+    }
+}
diff --git a/resources/extruders/wanhao_i3_extruder_0.def.json b/resources/extruders/wanhao_i3_extruder_0.def.json
new file mode 100644
index 0000000000..7d881079c4
--- /dev/null
+++ b/resources/extruders/wanhao_i3_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "wanhao_i3_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "wanhao_i3",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
diff --git a/resources/extruders/wanhao_i3mini_extruder_0.def.json b/resources/extruders/wanhao_i3mini_extruder_0.def.json
new file mode 100644
index 0000000000..c5abbd175e
--- /dev/null
+++ b/resources/extruders/wanhao_i3mini_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "wanhao_i3mini_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "wanhao_i3mini",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
diff --git a/resources/extruders/wanhao_i3plus_extruder_0.def.json b/resources/extruders/wanhao_i3plus_extruder_0.def.json
new file mode 100644
index 0000000000..0dae64ce63
--- /dev/null
+++ b/resources/extruders/wanhao_i3plus_extruder_0.def.json
@@ -0,0 +1,16 @@
+{
+    "id": "wanhao_i3plus_extruder_0",
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "wanhao_i3plus",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
diff --git a/resources/themes/cura-light/theme.json b/resources/themes/cura-light/theme.json
index a087a489eb..7bcdafce98 100644
--- a/resources/themes/cura-light/theme.json
+++ b/resources/themes/cura-light/theme.json
@@ -448,7 +448,7 @@
         "toolbox_footer_button": [8.0, 2.5],
         "toolbox_showcase_spacing": [1.0, 1.0],
         "toolbox_header_tab": [8.0, 4.0],
-        "toolbox_detail_header": [1.0, 12.0],
+        "toolbox_detail_header": [1.0, 14.0],
         "toolbox_detail_tile": [1.0, 8.0],
         "toolbox_back_column": [6.0, 1.0],
         "toolbox_back_button": [4.0, 2.0],