diff --git a/plugins/GCodeWriter/GCodeWriter.py b/plugins/GCodeWriter/GCodeWriter.py
index c15b079097..95d6659dd1 100644
--- a/plugins/GCodeWriter/GCodeWriter.py
+++ b/plugins/GCodeWriter/GCodeWriter.py
@@ -66,7 +66,10 @@ class GCodeWriter(MeshWriter):
     ##  Create a new container with container 2 as base and container 1 written over it.
     def _createFlattenedContainerInstance(self, instance_container1, instance_container2):
         flat_container = InstanceContainer(instance_container2.getName())
-        flat_container.setDefinition(instance_container2.getDefinition())
+        if instance_container1.getDefinition():
+            flat_container.setDefinition(instance_container1.getDefinition())
+        else:
+            flat_container.setDefinition(instance_container2.getDefinition())
         flat_container.setMetaData(instance_container2.getMetaData())
 
         for key in instance_container2.getAllKeys():
diff --git a/resources/definitions/ultimaker_original_dual.def.json b/resources/definitions/ultimaker_original_dual.def.json
index 6feaa07470..8d2d5d85d6 100644
--- a/resources/definitions/ultimaker_original_dual.def.json
+++ b/resources/definitions/ultimaker_original_dual.def.json
@@ -78,7 +78,7 @@
             "default_value": 185
         },
         "prime_tower_position_y": {
-            "default_value": 175
+            "default_value": 160
         }
     }
 }