Thanks Ollie, fascinating stuff, can't wait to try out that X-foil software. If the lift vs. AoA approaches a straight line by moving the peak thickness forward then that would indicate to me a smoother more predictable transition between AoA - up to the point of stall. As you mention then we are talking about a more abrubt stall point. However I'm curious if during the 3d flying mode if this point is not encountered as a model has already transitioned to flying off the prop rather than the wing. Hmmmmm, now I'm hooked.

Mike