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| true, but TT-01 allows much more flexibility on the car setup that TL-01. for a start, at least you can setup a competitive gear ratio against the TL01. 
 beside that, servicing the car's diff for a TL-01 is a pain
  (dis-assemble the chassic can takes an hour or 2) also the heat dissapation is very similar to the M-chassic (but in the M-chassic case, they are driven in slower speed, so heat will not be a big issues) 
 at the end of the day, i'll pick TT-01 for beginner racing, TL-01 for backyard bashing (I do have both of these chassic myself and i do use both of them to the extreme)
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