I think Caps have always been easy to snap. 25 years ago a friend had a 1/4 scale Cap (that was a big plane back then) that was very tricky to take off and land. It wanted to snap when airspeed was low and elev movement was high. This made it do some fantastic tumbles and flat spins. It was however a trade off. If you look at a Chipmunk like the one Goldberg used to kit. It has a very similar tail to the Cap. Hopefully we will get some insight from others on wing shapes. About the time I think I know something about it, I put a flight on my foamy which has no airfoil at all and it all goes out the window. The wing on it is tapered on LE and TE though :-)

David