diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 301dff3d20..4800950fab 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -199,7 +199,7 @@ class CuraApplication(QtApplication):
 
         self._message_box_callback = None
         self._message_box_callback_arguments = []
-
+        self._preferred_mimetype = ""
         self._i18n_catalog = i18nCatalog("cura")
 
         self.getController().getScene().sceneChanged.connect(self.updatePlatformActivity)
@@ -314,6 +314,9 @@ class CuraApplication(QtApplication):
 
         self.applicationShuttingDown.connect(self.saveSettings)
         self.engineCreatedSignal.connect(self._onEngineCreated)
+
+        self.globalContainerStackChanged.connect(self._onGlobalContainerChanged)
+        self._onGlobalContainerChanged()
         self._recent_files = []
         files = Preferences.getInstance().getValue("cura/recent_files").split(";")
         for f in files:
@@ -731,14 +734,30 @@ class CuraApplication(QtApplication):
             self._camera_animation.setTarget(Selection.getSelectedObject(0).getWorldPosition())
             self._camera_animation.start()
 
+    def _onGlobalContainerChanged(self):
+        if self._global_container_stack is not None:
+            machine_file_formats = [file_type.strip() for file_type in self._global_container_stack.getMetaDataEntry("file_formats").split(";")]
+            new_preferred_mimetype = ""
+            if machine_file_formats:
+                new_preferred_mimetype =  machine_file_formats[0]
+
+            if new_preferred_mimetype != self._preferred_mimetype:
+                self._preferred_mimetype = new_preferred_mimetype
+                self.preferredOutputMimetypeChanged.emit()
+
     requestAddPrinter = pyqtSignal()
     activityChanged = pyqtSignal()
     sceneBoundingBoxChanged = pyqtSignal()
+    preferredOutputMimetypeChanged = pyqtSignal()
 
     @pyqtProperty(bool, notify = activityChanged)
     def platformActivity(self):
         return self._platform_activity
 
+    @pyqtProperty(str, notify=preferredOutputMimetypeChanged)
+    def preferredOutputMimetype(self):
+        return self._preferred_mimetype
+
     @pyqtProperty(str, notify = sceneBoundingBoxChanged)
     def getSceneBoundingBoxString(self):
         return self._i18n_catalog.i18nc("@info", "%(width).1f x %(depth).1f x %(height).1f mm") % {'width' : self._scene_bounding_box.width.item(), 'depth': self._scene_bounding_box.depth.item(), 'height' : self._scene_bounding_box.height.item()}
diff --git a/cura/PrintInformation.py b/cura/PrintInformation.py
index 458cc4ac0f..d2476f25b6 100644
--- a/cura/PrintInformation.py
+++ b/cura/PrintInformation.py
@@ -122,6 +122,9 @@ class PrintInformation(QObject):
         self._calculateInformation()
 
     def _calculateInformation(self):
+        if Application.getInstance().getGlobalContainerStack() is None:
+            return
+
         # Material amount is sent as an amount of mm^3, so calculate length from that
         r = Application.getInstance().getGlobalContainerStack().getProperty("material_diameter", "value") / 2
         self._material_lengths = []
diff --git a/resources/definitions/renkforce_rf100.def.json b/resources/definitions/renkforce_rf100.def.json
index bdbc44ea8c..ebbe56ec8e 100644
--- a/resources/definitions/renkforce_rf100.def.json
+++ b/resources/definitions/renkforce_rf100.def.json
@@ -58,7 +58,7 @@
             "value": "100"
         },
         "machine_end_gcode": {
-            "default_value": ";End GCode\nM104 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\nG1 Z+0.5 E-5 X-20 Y-20 F{speed_travel} ;move Z up a bit and retract filament even more\nG28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\nM84 ;steppers off\nG90 ;absolute positioning"
+            "default_value": ";End GCode\nG91 ;relative positioning\nG1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG1 E-5 X-20 Y-20 ;retract filament even more\nG28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way\nG0 Z{machine_height} ;move the platform all the way down\nM104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nM84 ;steppers off\nG90 ;absolute positioning\nM117 Done"
         },
         "machine_gcode_flavor": {
             "default_value": "RepRap (Marlin/Sprinter)"
@@ -70,7 +70,7 @@
             "default_value": "Renkforce RF100"
         },
         "machine_start_gcode": {
-            "default_value": ";Sliced at: {day} {date} {time}\nG21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG28 X0 Y0 ;move X/Y to min endstops\nG28 Z0 ;move Z to min endstops\nG1 Z15.0 F{speed_travel} ;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 F{speed_travel}\nM117 Printing..."
+            "default_value": ";Start GCode\nG21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG28 X0 Y0 ;move X/Y to min endstops\nG28 Z0 ;move Z to min endstops\nG1 Z15.0 ;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\n;Put printing message on LCD screen\nM117 Printing..."
         },
         "machine_width": {
             "value": "100"
diff --git a/resources/qml/Cura.qml b/resources/qml/Cura.qml
index 9949e9ab0b..71b6eeabf2 100755
--- a/resources/qml/Cura.qml
+++ b/resources/qml/Cura.qml
@@ -90,7 +90,7 @@ UM.MainWindow
                     text: catalog.i18nc("@action:inmenu menubar:file", "&Save Selection to File");
                     enabled: UM.Selection.hasSelection;
                     iconName: "document-save-as";
-                    onTriggered: UM.OutputDeviceManager.requestWriteSelectionToDevice("local_file", PrintInformation.jobName, { "filter_by_machine": false });
+                    onTriggered: UM.OutputDeviceManager.requestWriteSelectionToDevice("local_file", PrintInformation.jobName, { "filter_by_machine": false, "preferred_mimetype": "application/vnd.ms-package.3dmanufacturing-3dmodel+xml"});
                 }
                 Menu
                 {
@@ -106,7 +106,7 @@ UM.MainWindow
                         MenuItem
                         {
                             text: model.description;
-                            onTriggered: UM.OutputDeviceManager.requestWriteToDevice(model.id, PrintInformation.jobName, { "filter_by_machine": false });
+                            onTriggered: UM.OutputDeviceManager.requestWriteToDevice(model.id, PrintInformation.jobName, { "filter_by_machine": false, "preferred_mimetype": "application/vnd.ms-package.3dmanufacturing-3dmodel+xml"});
                         }
                         onObjectAdded: saveAllMenu.insertItem(index, object)
                         onObjectRemoved: saveAllMenu.removeItem(object)
diff --git a/resources/qml/SaveButton.qml b/resources/qml/SaveButton.qml
index bbc40b6627..fef4f3780d 100644
--- a/resources/qml/SaveButton.qml
+++ b/resources/qml/SaveButton.qml
@@ -215,7 +215,7 @@ Item {
             text: UM.OutputDeviceManager.activeDeviceShortDescription
             onClicked:
             {
-                UM.OutputDeviceManager.requestWriteToDevice(UM.OutputDeviceManager.activeDevice, PrintInformation.jobName, { "filter_by_machine": true })
+                UM.OutputDeviceManager.requestWriteToDevice(UM.OutputDeviceManager.activeDevice, PrintInformation.jobName, { "filter_by_machine": true, "preferred_mimetype":Printer.preferredOutputMimetype })
             }
 
             style: ButtonStyle {