Bowden Extruder for 3up

This is my remix of a bowden extruder for the 3up.

Very much in progress like the hotend mount.

Adjusted frame holes to mount on 3up frame, and changed the ptfe attachment mechanism to press fit this part: http://e3d-online.com/E3D-v6/Spares/Embedded-Bowden-Couplings-For-Metal-1.75mm-Filament

**Update 1/14/2015** - Printed preliminary model, and have found a few bugs. The hole for the bowden connector is slightly small, although it may work if i heat the connector before press fitting, however i didnt do this and my test print cracked. Also there is only 1 layer at the top of the hole for that connector, so it is extremely weak. I will modify the model to be thicker at that point. See v0.2 attached for this modification. I will hopefully be able to print this tomorrow evening, and if I get good results I'll print the other parts and test fit everything.