My trainer had bolt on wings. (RCM 40). Believe me, when she finally endured her fatal crash at my hands it was not the wing that suffered - that was relatively unharmed. The Nylon bolts sheared clean. Then again, it was not a cartwheel crash. More of a Split-C (1/2 if a Split Esse).

I've seen Ultra Sports at our club and they fly darned nice, but I could tell right away it would bite me as a second plane. I went for a Big Stik. (Actually I built a Contender 60 in between but have yet to fly that).

Here's a repair tip that works splendidly for me. To reinforce the inside of damaged areas use trimmed pieces of coffee filters with epoxy squeeged over the spot. Dollop on some epoxy on the area. Lay on the filter patch. Squeegie out the epoxy with a piece of plastic milk jug as a spatula. As it oozes out spread it back over the filter patch. This method removes most of the epoxy so it won't add unneeded weight. It ends up thin and strong.