[Kevin Sevcik]

Also, the servo spazzing could be caused by running the servo PWM near the FP power leads if you run them together for any significant distance, you could have a problem. You wouldn't notice anything running the motor off another battery because it's getting a constant DC voltage. Unless the Victor is running at 100%, the voltage will be jumping between 0V and 12V. If your PWM is running alongside the power leads for long enough, it could be slightly coupled with the leads, and will pick up some of those 0V to 12V jumps. Especially because the FPs can draw large currents.

Try running a temporary PWM completely detached from your chassis and away from all other wiring and see if that fixes the problem.