Yeah, disappointment after disappointment has thought us that its just not worth spending money on tuning a RC. I just took my head off to replace the valve stem oil seals because it was drinking a liter every 1000 k's. As I was lapping the valves one broke in half. I wasnt putting a lot of pressure on it with the drill ad it had plenty of paste. It looks like I just averted a broken valve break down. Things are starting to go on the RC's that have never gone before.