Thank you everybody, for your thorough response(s)! @gmrhodes13 OK, time for me to make a second pass on references. This is the reason for no adhesives used yet; @IcyTrooper Yes, that's possible. I don't have a lot of info about the armor, but it's from one of the first instances in which measurements were permitted to be taken in the Archives. You may know more about that history than myself.
Finally I grabbed the Anovos TK Shock helmet which, ironically, is ANH I think...
Will do, thanks!