This is an adequately close model of Magneto/Shaw's helmet from x-men first class. Total print time is about 25hrs.
Designed for a 7.5" head width. In
...Plus hindsight it is a bit too big, and I would scale it by 7/7.5 if I were doing it again.
The first one was printed on a Fablicator.
www.fablicator.com
