When you go to epoxy a pinned hinge, make sure you heat a bit a vasaline in a spoon, fold the hinge in half and dip the hinged portion in. You want the liquid vasaline to penetrate around the pin - this keeps exoxy out of it and keeps it from being a pain to free up. Also, make sure you don't mix up the protected (vasalined) hinges from the non-protected or you'll spend an evening with an X-Acto blade cutting out epoxy and flexing the hinges - and don't as how I know that .

Also, some people will drill and put a tooth pick through the plastic flat to secure it in place after they epoxy them in place just for added security so they won't pull out.

Hogflyer.