The differance between the blown engine and the nitro is night and day.we could run the blown moter like a brackett car . The nitro moter is more unpredictable and harder to tune .I check the rod bearings between each round and the main bearings at the end of each race day. If a piston has to be changed then i push that out as well.When i am done i help with the heads if we are running a bit late.Next year will be my last with Dave ,i have just spent two years building this ,,see pic,,and i am gagging to get this bad boy kicking a'[;p