Jaw Hinge Problems

Hi all.

I'm having some problems with the hinges on my resin mask. I don't have a good place to glue the lower hinge to jaw since it's curved. I tried using some of that plastic mesh stuff (the stuff some people use for ears, or jaw hinges on foam heads), but it's not strong enough to keep the jaw aligned with the top half properly. How do you attach the hinge to the jaw? Do I just need to re-position it? I'll post pictures under the cut.

On another note, do I need to attach my resin blank to a balaclava before I fur it? How do you do the back of a resin head?

Thanks! :)