I mailed Rossi... I was just using the incorrect fuel... or not incorrect but here is explanation... with higher nitro content I have to use an extra shim for the head to decompress engine... they recommend Omega 10%... I used 20% and didn't add the shim so that could explain the leak at the head? and also why it got hot Sidewinder uses 12% oil and Omega 17-18%... the oil content can it make difference to heat?