ok so a friend of mine just bought the non pull start 21 size version of this engine to run in nitro buggy competition. i have my doubts about it holding up in the world of buggy racing even at a week to week club level. this is his first go at nitro buggy and from my exprience with nitro. you pretty much get what you pay for with engines. so at 70 dollars. im sceptical . anybody use this engine at a competition level?