Wanhao i3 plus PTFE Filament Guide

A couple of mounts for 10mm hex pneumatic fittings for PTFE tube. Lets you create a 'bowden style' filament guide; I've found this leads to much more uniform extrusion. You could achieve the same thing without the pneumatic fittings, but I think this way looks better...

Both fittings are designed to be press fit, so you might need to sand the inside down a little depending on printer tolerance and fitting variations. The extruder guide is fitted to the carriage just above the extruder inlet u