I use clear packing tape on my Figherbird. If you make the wing so strong that the prop won't hurt it you will be replacing props instead. If you stiffen the wing mount so that it won't pivot in a crash, you will be replacing wings (they fold up pretty readily). I putz around with mine on my lunch hours and at home, and currently have three spare wings. I figure them to be mostly expendable. These little tykes just aren't responsive enough to avoid bumps and bruises.