Yeah, but he keeps saying the engine felt funny when he turned it over by hand after the crash (I'm assuming with engine out of the plane where no spinner will rub).
My guess is that he flat spotted a bearing or ingested some dirt in the inverted pancake. Lots of little things can go wrong, though I doubt the con rod is bent...
Eating up a lot of bandwidth for stuff that would be fairly simple in person. I can imagine your frustration Matt.
On the P40, I've run a lot of ST60 planes... and you have to keep the speed up in the corners. Running it too deep in a 4cycle away from the break and the engine goes kinda dumb on you.
This is fine if you put it in a small, lightweight plane and the motor just torques it's way through everything (like running a 75 in a small plane these days) but the ST60 is not really a powerhouse you can do that with in a plane your size. So... without seeing the run, all I can do is ask if you if the engine is "coming on" for you?
The one picture posted shows a lot of line bow, but that could be a landing for all I know. If it's not, leadouts and tipweight are probably a bit off, and/or lap speeds a bit slow. You might be stalling the outboard tip just carrying a bunch of extra weight for all I know. I'd have to see the stall to know if its a full wing or partial stall.
One last item... but I hate to critique your flying in public (ok judges look the other way, LOL.) So I will email you something seprately.

EricV