You can use all the Tamiya hop part you want.In the mini class they give each competitor a new stock motor at the beginning of the race.That what makes it cool kind of like Spec racing no cheaters.I really don't like the Tamiya MINI tires they wear out really quick compared to the HPI tires.
I am going up on September 29th to watch the finals to see what the TCS is all about.I am interested in the MINI class and the Tarmac rally class.Should be fun.I have found a website that might be of interest to you all it called
Club Tamiya Very cool site has a list of all the cars and also you can view the manuals of the car and photos of each car.