You mean lower the nitro content for that engine or stay away from nitro engines all together?

I think it might have been a combination of aerated fuel and a manufacturer defect, leaning on the defect side.
If you look at the copper head gasket, there is a burn mark that goes from inside to outside. That to me indicates a bad mating surface between the steel cylinder and the aluminum head....almost as if the sleeve isn't flat on top. You can see what I'm talking about in the second pic.

Anywho, I sent in the engine today, we'll see what happens.