[KenWittlief]

255 is not a valid output for pwms (victors) - it can make the communcation between your code and the layer above it lose synch

254 is the max you should ever output

that might be why your victor wacked out

or it could be it wasnt calibrated correctly - if you are certain you are sending it 127 and the motor is still trying to move, then it either needs to be recalibrated, or its not working correctly.

to answer your original question, it says in the robot section of the manual which motors you can use with spikes - Im almost certain a window motor would be ok.