I've only had CA hinges tear like that once, probably from lots of vibration and a flexing, shearing force on it. In any case, I usually find it easy to replace CA hinges with flat, pinned hinges which are about the same size and shape and work just as well with the existing bevel on the control surface. Actually, pinned hinges make really nice installations,it's just that CA hinges are easier to install. Dubro and Klett and GP make them. Cutting slots is best done with the GP hinge slotter with the nylon hinge cutting blades. I recently posted a how to for these hinges somewhere, If you look up my screenname maybe you can find it there if you want. I havent used Robart Hinges as yet.

Peter