Torsion Spline Torque transmission linear rail

A Torsion Spline; you can transmit rotational force while the torsion spline, a quadrilateral of 2mm x 2mm, can move freely "through" the Motor. So the target of that mechanical transmission can change the distance to the motor.

This is part of the simplified Zero Gravity Extruder https://www.thingiverse.com/thing:3476266

-This is done by an array 6 of small flanged bearings (bore: 3mm, 10mm outer diameter small, 11.5 outerr diameter flange, 4mm width).

-Beside the lateral quadratic spl