Agreed with what Simon said.
In my opinion the Tamiya TEU101BK (assuming that is what you have) can handle any motor you would want in your mini at Gloucester. I've run that controller on a 17T motor without a problem in a mini, and that is far too fast for the chassis at the Glos track. The lack of gearing choices mean you can't run motors with low turn counts because you will end up being over geared as the track is so small.
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