Skull Mask with Moving Jaw

My brother asked for a skull mask with a movable jaw. So I got to work to make an angry skeleton mask….iykyk.   I used a little bit of AI magic to help me create the outside and then modeled the inside, hinge, jaw movement, and hardware with studio, meshmixer, and blender.    After a lot of work, this is what came out, a skull mask that you can ass some rubber bands to and make the skull speak. I did include 3d printable hardware, but you can use a 4m screw and nut instead. I just didn't have any long enough.    Note: There are also places for straps although I may rework the sides to increase strength around the strap holes. Also this is based of my own head, which is somewhere between the Budwin sizes 3 and 4 head. https://makerworld.com/en/models/525268-sizing-heads-updated#profileId-682581