Amadon's Double Bowden Direct Drive Extruder 1.75mm filament

Double Bowden direct drive extruder. I designed it for the E3D Cyclops/Chimera but it can be used with any dual extruder setup.

EDIT 6/6/16 Added new version of the idlers. These new idlers have support for the bearings on both sides so it can't bend over and lose clamping pressure on the filament.
There's a 0.4mm thick support material built in that you must cut out. No support needed from your slicer. Use a washer on BOTH sides of the roller bearing. Low profile nut of course. The flat si