Hello everyone, I have a defective force mashine would like to turn this one rim polishing machine. My idea: from a washing machine engine over a rib belt the shaft should be driven. Question 1: I absolutely need a speed regulator (where to buy?) Question 2: assumed the engine turns with 3000 rpm the circumference of the strap disc on the engine is 10cm, the circumference strap disc on the shaft 30cm so the shaft turns with 1000 rpm Question 3:how much U/min will be born to polish the rims Smoked?