The rings use 4-40 hardware but M3 might also work.  The autofocuser uses a nema 14 with this mount: https://www.pololu.com/product/2257.

I used a 14t GT2 pulley on the stepper motor and a 2GT-280 belt.

The large GT2 pulley for the focuser should probably be printed with a resin printer.  Then you'd sand the internal diameter until it can be pushed onto the the focuser knob.

AT60ED Autofocus and Support parts

scope support bottom.stl

I was not happy with the star shapes I got from the commonly used semicircular cable router so I designed this.  It incorporates an aperture mask of 198mm and 4 cable routing channels that give stars a typical newtonian diffraction pattern.

After printing use a few wraps of tape around to circumference to give a snug fit.  It should engage the two pins inside the front aperture ring.   After sliding it in rotate 5 degrees clockwise to lock it in place.

There are 3 versions:
* 3mm wide cable channels for RASA 8
* 6mm wide cable channels for RASA 8
* 3mm wide cable channels for C8 w/Hyperstar

RASA 8 and C8 Hyperstar cable router and aperture mask

Rasa 3mm cable channels.stl

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AT60ED Autofocus and Support parts

RASA 8 and C8 Hyperstar cable router and aperture mask