Double motor extruder

This is my approach to bowden extruder poor grip problem.

Decided to hook up together two nema_17 motors on same driver
(Raised voltage on driver to 1.2v - maybe ill need better adjustment)

Using regular Mk7/Mk8 grip gear(12mm diameter)
and U-shaped Bearing (13 mm diameter 4mm bore 4 mm width)

U-shaped Bearing is hold by M4 skrew

im using tree 6mm rods to align tentioner
Ive threaded the rods and skrewed them to the plastic
You can probably use regular M6 skrews for this

with three springs inside its hard to open extruder by hand so i jam screwdriver to install filament