Woketman is 100% correct - unless the hinge point is completely encased in solid structure (foam, balsa, etc.), a more 'runny' expoxy is preferred.

I have built lots of open-structure 35-45% models using hinge points and allowing the 30-min. epoxy (mixed with a bit of cabosil or milled fiber) to pool around the hinge point really locks it in.

barry