[Justin Stiltner]

Going from questions similar to this in the past... it would seem to be legal... because it specifies that you cannot modify the internal electronics of the motor, but you can modify the housing... hrmm... maby this is one of those times where they give you enough rope to hang yourself.... because as the steel was removed it would also mess with the magnetic flux inside the motor and probably lower efficiency, similar to removing the metal band on the FP motors.