I recently pulled apart two old hard drives, and extracted the stepper motors. I already know they would have to be fairly accurate to be used in hard drives. So here are my questions: 1. These were 7200 RPM hard drives. I'm guessing the motors are probably capable of going much faster than that. How fast can I safely run these motors? I can't find any specs for them. 2. I neglected to measure the voltage the hard drive used to run the motors, and as of yet I haven't found anything. About voltage should be going to the coils? 3. Am I correct in saying that they have three coils because the motors have 4 leads? 4. How much torque can I get from one of these things? Would it be enough to run a small remote vehicle? Or would it be more suited to something like a camera mount?