ATB, I'm not sure, but I don't think a resisitor would work. If you added resistance you'd decrease amperage, but voltage would stay the same. Remember Ohm's law. Amps x Resistance = Volts. I'm not sure how that would affect a BL motor. Probably not good though.

If I remember right a diode may work. I used them once for something a long time ago (can't even remember what [sm=confused.gif]) and I think they dropped 1.2 volts per diode.

The problem is volts x amps = watts. If voltage is dropped then overall power is reduced. I want the power just at a lower headspeed. Even if no other pinions work it's just a matter of finding the right Kv motor. Like I said the first motor was a reference point. I'm confident my next motor will put the headspeed where I want it. Plus I'm keeping my fingers crossed.