I want to make a tester for magnitos using a 1/2 or 3/4 horse a/c motor. I need to spin the magnito from 0 rpm to maxium rpm (1750). I've seen testers that had a rheostat mounted on the back of the motor with a handle that rotated from 0 rpm to full load. This is probably an older unit, I don't know. But it looks like a good set-up. I would appreciate any and all information on products and where to buy this at. Thank's Mike.