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I have a second hand anglewinder NSR Mosler with a King 30 motor that goes like a bat out of hell but has no brakes at all! On a 30' straight I'm having to 'brake' 10' from the end to make the corner. The Parma resistor controller is wired for brakes as is the track, of course. The same controller works well on other NSR, Sideways, Slot.it and ScaleAuto cars so it must be the Mosler. 

Is there anything I can do to improve create some braking without changing the motor? Gearing? Larger dia. tyres?

P.S. Racing is mag-less.