[MetalMan]

Yep, no flat spot = no grip. What I usually do is remove the rotor from the motor, shove the shaft through a plastic bag, stick the other end of the rotor in the vice, and dremel a flat spot along most of the length of the shaft. If I can't get the rotor out, I still use the bag, but I attach the three motor leads together (to help keep the rotor from spinning), and lay the motor in the vice (but don't clamp down on it). So far all of my flat spots look incredible :005:.