Some explanation:
I use my TT01 in the Tamiya Euro Cup Series. There's a "Gentlemen Class" for drivers that are at least 30 years old. The only chassis in this class is the TT01 with pretty much any hopup from Tamiya allowed. Body has to be touring car from the real German touring car series (DTM), Motor is the Carson Cup Machine (about 8$), tires are Type A from Tamiya (53433).
We also used the chassis during the 24HR race at the track in Sinzig. Last year we reached a distance of 497 miles (winning team did 546 miles).