Imjonah
The way I udnerstand it, the MVP or orion has too much saturation time for the arm. That is why the brushes have to be narrowed to .140 or .145. This gives less time for the coils to be energizes and lets the motor run cooler.
12 scale has done this for a long time. Can't make run time? take a little off the trailing edge. It WILL help at the cost of torque, but adds RPM. Result, make the 8 minute race in 1/12.
I'll take a P2K2 or GM3 over em all!