Hi Bob

I agree if the plane was to heavy it would need landing faster. As the other guy's have said. I think, and hope you are onto something with the wing incidence. If it hovers in a brisk wind with only prop wash, but then tip stalls at speed near the ground i dont think that is weight related. I think with it only tipping one way is another clue. I think that when i flair out on landing if the incidence is wrong will create this stall.

I hope this is the case as the plane is mint and it would be a shame to break it.