Dual Direct Drive all in one for E3D V6. Reprap Prusa i3 rework

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 side of the idlers should face towards the motors. Slightly raised sides towards the front. Put the nut on the motor side.

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