Extruder Case (Air Cooled)

Due to high forces to be applied to my extruder i decided to use a full metal version. My part combines extruder and motor. In addition it's also suitable to support a (60x60mm) axial fan for cooling motor and filament.

All can be fixed with M3 screws.

https://www.amazon.de/Reprap-Bulldog-Bowden-Extruder-Filament/dp/B01FD1K3GQ/ref=sr_1_8?s=ce-de&ie=UTF8&qid=1496173778&sr=1-8&keywords=Metal+extruder

(Update 20.07.2017)
With version1.5 (bowd_extr_mainv1_5.stl) I have improved the main a