graphitdust- I have found this as well and what I have come up with is that I might not have fully broken in the brushes and they complete their break in process while I'm testing them. I also have to re do the voltage when I change motors. This tells me that the power is constant but all info should be accurate if all motors are tested at 4 volts for example. I go by sound as well as the rpm info it gives. Higher winding stockers with high rpm's makes me think that I will be a little down on torque and I must gear down some. If it's a real screamer I'll do a pull with the real dyno just to see all of the motors info.