I'm looking at re-purposing a PWM controller and motor from a treadmill to drive a mini-lathe. The MC-2100 board which was originally designed for this motor lacks the PWM circuitry to drive the mosfet, as this originally seems to come from the console. Is there a good spot to connect a 555 used as a pwm generator to this board without major surgery ? It seems as though it might be as simple as connecting the 555 to the blue 'speed control' on HD2, but I suspect the little on-board microprocessor may have other ideas. Does anyone have the actual print on the MC-2100 board ?