I am modifying my printer to utilize duel extrusion....but with only one hot end. I was an investor in a kickstarter project call Prometheus. I don't know if they ever shipped anything, but I got my money back and decided I could build the system myself and so I did. I just completed the high power Bowden extruders. They use a 5:1 geared stepper motor along with a very large gear. The extruders are aluminum and will mount on my x-axis carriage. They will move up and down with the Z axis so the Bowden tubing length is held to a minimum. The filament "V" guide is something I made so if you want the files, let me know.

#136 Craig Anderson, Yesterday at 1:13 PM