Printed on Ultimaker 2 :- 10% infill- 1.5 mm shell thickness- ~30/45 min to print on custom fast settingsThis does not obstruct the JR bay.Needed: - 2x m3x12 - 2x m3x10 Make sure the screws are tapping their own thread into the plastic, it needs to twist in firmly.Design changes:07-03-2014 : Fixed orientation problem