PTFE holder for 3up

Connect a PTFE to your 3up printer to allow for easy feeding of filament.

Uses this part:
http://www.filastruder.com/collections/e3d-spare-parts-and-accessories/products/bowden-couplings-threaded-1-75mm
and the ptfe tubing:
http://www.filastruder.com/collections/e3d-spare-parts-and-accessories/products/ptfe-tubing


Use a drill to carefully enlarge the hole in the extruder so it is a tight fit (practice on a scrap first to find the right bit). I drilled down about 6mm.

Pair this with a filament spool roller bearing and have jerk-free filament feeding:
http://www.thingiverse.com/thing:366486

Remixed from here:
http://www.thingiverse.com/thing:17234