[FrankJ]

Looking at the slip ring. 5A will not run your shooter motors. The slip ring center line needs to be on the turret center line. So your ball transport either needs to be not through the center liner or your slip rings needs to be of sufficient Dia to allow the balls thru it.

I have never tried it, but I would be hesitant to run any kind of digital com (encoder, canbus) thru a slip ring.

Igus does make energy chain designed for 3D movement. It is a little space intensive though.

Carefull use of wire ties & spiral wrap will allow +- 180 degree rotation fairly easily.