I too have been "fighting" my TC4 for a while, but not because it's not a good competitive car, but because I want to make it an even better one.
Son Josh already laps regularly below the lap record. While he has been away on holiday I have concentrated on the TC4 and tried different things each day. Some were lousy and the lap times immediately showed it, but with yesterday's set up I seem to have finally hit it right. Betweem Saturday and yesterday evening I have found over half a second consistantly, using the same tyres, motor and cells. It is now so responsive and easy to drive. I can't wait to see the sort of lap times he is going to do with it.