You no nothing about redcat. there are alot of parts from HPI that interchange. If you look up the tsunami or any redcat rc you would see that ALOT of people own them and like them. But who am I? I dont know anything. And If you read I did not do 1 pass and the speed was OVER 40. The reason Im tuning it down is because my son does not need to go over 40 and he does not keep an eye on temps. If it were mine I would leave it right where I had it because I can keep an eye on temps. Also temps were in the 90's and humidity was 100%. That has an effect on engine temps. Am I talking to a Kid or what. I dont need to explain myself to anyone that has NO CLUE!!!!!!! Oh BTW did your post get deleted? HMMM I wonder why?