Direct Drive Bowden extruder for Mk8 drive V5

This part is designed specifically for an Mk8 drive gear with an effective drive OD of 7mm. It attaches directly to the motor and has no provision for attachment to the machine since that may be different for almost everyone. I'm using mine on a Kossel 2020, and therefore I used my Kossel 2020 extruder stepper mount. http://www.thingiverse.com/thing:783695

I've tested this extruder and drive gear for over a year now and have done prints as long as 16 hours with it.

This design incorpor