use the mc 60 controller, that motor will draw to many amps for a aftermarket one. As for the pulley size i had a 10" atlas and i ran direct to the pulley on the spindle, next to the largest, around a 4", and the motor pulley was around a 1 1/2".
My 2hp compressor uses one. Works fine as long as it is accurately aligned and not fouled.I've been considering using one of the flat belts that have seven , eight or more grooves in the inside face for that's what was on out lawn mower it didn't slip till my lass tried to modify some concrete withe thing whilst cutting the lawn.
I've found a company in the UK that has them in all manner of lengths and number of grooves etc.
Are these sort of belts good to drive our bespoke man cupboard machinery or are they too flimsy for most things ?