Was doing a minor repair job when I noticed one of the four CA hinges on my LT-40 elevator is sheered. I've got 3 good ones still. I would imagine the smart thing to do is to ground the airplane. Could I still fly it with 3 good hinges temporarily?

How do I go about fixing this? I wouldn't mind switching to pinned hinges if they would be better. No sense in going to all the work to repair this just to install more CA hinges. However, I would imagine that I'd have to actually cut the remaining three so that I can remove the elevator completely to do the repair. Is there anyway to remove the old CA halves from the stab and the elevator and insert the pinned hinges right into there without having to cut new slots and relocate? Perhaps a razor knife could cut out the old pieces, then some epoxy to lock in the new hinges. Just thinking out loud.

What would you recommend?