I bought my i3V with the e3D hotend with the intention of using my existing printrbot aluminum extruder in a bowden setup. It was a very easy conversion, only had to buy a bowden tube and grove mount bowden adapter from filistruder and print this one piece to make it work. I uploaded the full .blend file I pulled the model from, it has models imported for the gregs wade extruder, printrbot aluminum extruder, e3d hot end, and some models I created around them. Should have anything you could need to edit my models or make your ownBasic print, but you might want it to be sturdy as it is meant to bow to apply pressure downward. I used 3 shells and a 30% infill