Extruder Gear Case (Bondtech)

Update: There is a new version at http://www.thingiverse.com/thing:1018949

Extruder case for the Bondtech drive gears. Unless you have a specific reason to use this version, most people will be better off using the design provided by Bondtech (http://www.bondtech.se/stl-files/). That one has been well tested and works.

This version was made to be smaller and without the groove mount so I could quickly switch between direct drive and bowden. I'm using the following linked parts for m