An admittedly small update, but a somewhat significant one nonetheless. You might remember I made mention of wanting a moving jaw emplacement. I haven't made the necessary cuts / drilled the necessary holes yet, but I was going to use hair ties on either side. Need to think of placing a cardboard or plastic bar across the section where my jaw would rest for the actual movement of the fursuits jaw, leaving ample enough room that my head would fit but close enough to my mouth that it'll move when my mouth moves.
I'm more looking forwards /dreading placement of the foam sheeting, and the fur shortly thereafter.