Ok, I had support issues with all of the dragon box lids so i added supports in meshmixer. There was also a hole in v3 dragonbox bottom. And there were no hinge pins for the hinges

So
Top - added nice thick 5mm supports for the chin and both wings. They will break off with a satisfying snap and they will print even at 200mm infill speeds. They will not tip over.

Bottom - added supports to all the added weapons and the dragon heads. also filled in and sort of smoothed out the hole in the short side by the mace.
prints flawlessly

Hinge pins - pins should push in from the outside. they will be flush and should keep the top and bottom connected. They are also removable just use a pen or probe to pop them out.

Printed in PLA. So they should be ok for pet-g but i'm not sure how they would react to attempting in ABS.