Tamiya’s own ProSpec class is a lot of fun and has low entry costs. At present you are allowed to use certain hop ops that will increase the investment into the kit, but none honestly provide any improvement performance. At our last TCS, the 2nd place driver built his car from spares and was up amongst the top 3.. 1 and 3 had full optioned TT02 RRs.

ps, I was 3rd 😉