AT60ED Autofocus and Support parts

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.