R2D2 Revised Dome Motor Holder

This is a revised version of the motor holder from mrbaddeley. It's designed to hold this motor along with a 22mm slip ring at the top. I added some air vents to let the motor breathe a bit as well as enlarged the flanges used to put the bolts in on the motor clamp.

Slip Ring: https://www.ebay.co.uk/itm/121917586691?ul_noapp=true

Motor: https://uk.rs-online.com/web/p/dc-geared-motors/3213164/