I never used a dremel to make torque plates. It must be very time consuming.
I use angle grinder, Zip discs, files and hand drill. I make them through axle, bolt on type, so the torque plates are staying on the motor when I take off the wheel. This is letting me making them very tight fit since they won't need to slide on and off the axle. I just file and try, until I can press them in.