diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index f32993fd20..6e1dcedeae 100755
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -275,7 +275,11 @@ class CuraEngineBackend(QObject, Backend):
                 error_labels = set()
                 definition_container = self._global_container_stack.getBottom()
                 for key in error_keys:
-                    error_labels.add(definition_container.findDefinitions(key = key)[0].label)
+                    definitions = definition_container.findDefinitions(key = key)
+                    if definitions:
+                        error_labels.add(definitions[0].label)
+                    else:
+                        Logger.log("w", "Unable to find definition for key: {key}".format(key = key))
 
                 error_labels = ", ".join(error_labels)
                 self._error_message = Message(catalog.i18nc("@info:status", "Unable to slice with the current settings. The following settings have errors: {0}".format(error_labels)))
diff --git a/plugins/MachineSettingsAction/MachineSettingsAction.qml b/plugins/MachineSettingsAction/MachineSettingsAction.qml
index a717ee6fa6..4511665c58 100644
--- a/plugins/MachineSettingsAction/MachineSettingsAction.qml
+++ b/plugins/MachineSettingsAction/MachineSettingsAction.qml
@@ -29,7 +29,11 @@ Cura.MachineAction
         repeat: false
         interval: 1
 
-        onTriggered: base.extruderTabsCount = (machineExtruderCountProvider.properties.value > 1) ? parseInt(machineExtruderCountProvider.properties.value) : 0
+        onTriggered:
+        {
+            var extruderCount = parseInt(machineExtruderCountProvider.properties.value);
+            base.extruderTabsCount = (extruderCount > 1) ? extruderCount : 0;
+        }
     }
 
     Connections
@@ -42,6 +46,7 @@ Cura.MachineAction
         onAccepted: manager.onFinishAction()
         onRejected: manager.onFinishAction()
         onClosing: manager.onFinishAction()
+        onVisibilityChanged: extruderTabsCountDelay.start()
     }
 
     anchors.fill: parent;
diff --git a/plugins/USBPrinting/USBPrinterOutputDeviceManager.py b/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
index 5b1d0b8dac..7a62a59a45 100644
--- a/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
+++ b/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
@@ -259,7 +259,7 @@ class USBPrinterOutputDeviceManager(QObject, OutputDevicePlugin, Extension):
                 i = 0
                 while True:
                     values = winreg.EnumValue(key, i)
-                    if not only_list_usb or "USBSER" in values[0]:
+                    if not only_list_usb or "USBSER" or "VCP" in values[0]:
                         base_list += [values[1]]
                     i += 1
             except Exception as e:
diff --git a/resources/definitions/delta_go.def.json b/resources/definitions/delta_go.def.json
index b341a17656..ccb659f973 100644
--- a/resources/definitions/delta_go.def.json
+++ b/resources/definitions/delta_go.def.json
@@ -14,23 +14,29 @@
 	},
     "overrides": {
 		"machine_name": 			{ "default_value": "Delta Go" },
-		"material_diameter": 		{ "default_value": 1.75 },
+		"material_diameter": 			{ "default_value": 1.75 },
+	        "default_material_print_temperature":   { "default_value": 210 },
 		"speed_travel": 			{ "default_value": 150 },
-		"prime_tower_size": 		{ "default_value": 8.66 },
-		"infill_sparse_density": 	{ "default_value": 10 },
+		"prime_tower_size": 			{ "default_value": 8.66 },
+		"infill_sparse_density": 		{ "default_value": 10 },
 		"speed_wall_x": 			{ "default_value": 30 },
 		"speed_wall_0": 			{ "default_value": 30 },
 		"speed_topbottom": 			{ "default_value": 20 },
-		"layer_height": 			{ "default_value": 0.2 },
+		"layer_height": 			{ "default_value": 0.15 },
 		"speed_print": 				{ "default_value": 30 },
-		"machine_heated_bed": 		{ "default_value": false },
-		"machine_center_is_zero": 	{ "default_value": true },
-		"machine_height": 			{ "default_value": 127 },
-		"machine_gcode_flavor": 	{ "default_value": "RepRap (Marlin/Sprinter)" },
+		"machine_heated_bed": 			{ "default_value": false },
+		"machine_center_is_zero": 		{ "default_value": true },
+		"machine_height": 			{ "default_value": 154 },
+		"machine_gcode_flavor": 		{ "default_value": "RepRap (Marlin/Sprinter)" },
 		"machine_depth": 			{ "default_value": 115 },
 		"machine_width": 			{ "default_value": 115 },
-		"retraction_amount": 		{ "default_value": 4.2 },
-		"retraction_speed": 		{ "default_value": 400 },
-		"machine_shape":            { "default_value": "elliptic"}
+	        "raft_airgap": 				{ "default_value": 0.15 },
+		"retraction_hop_enabled": 		{ "value": "True" },
+	    	"retraction_amount": 			{ "default_value": 4.1 },
+		"retraction_speed": 			{ "default_value": 500 },
+	    	"retraction_hop": 			{ "value": "0.2" },
+        	"retraction_hop_only_when_collides": 	{ "value": "True" },
+	    	"brim_width": 				{ "value": "5" },
+		"machine_shape":            		{ "default_value": "elliptic"}
 	}
 }