Opening SpaceX Helmet Replica! It is a work in progress, but as of this point you can print a functioning helmet! Well, 'functioning' meaning it opens, don't try to go to space with it. And don't use it for protection.
You will need a 250 mm x 250 mm bed (10" x 10"). Parts can be glued together or bolted together with inserts and screws.
Inserts and screws (about $20 worth):
M3 x 0.50 mm Brass Inserts: https://www.mcmaster.com/94459a130
18-8 Stainless Steel Hex Drive Flat Head Screw, M3 x 0.5 mm Thread, 5 mm Long: https://www.mcmaster.com/92125a125
18-8 Stainless Steel Hex Drive Flat Head Screw, M3 x 0.5 mm Thread, 8 mm Long:
18-8 Stainless Steel Hex Drive Flat Head Screw, M3 x 0.5 mm Thread, 12 mm Long: https://www.mcmaster.com/92125a132
Use a soldering iron to install the inserts.
Visor mold for vacuum forming is included; as you can see in the pictures I haven't molded one yet. If you do, please give feedback!
Outer Shell without the unsightly screw holes (will need to be glued together): https://www.thingiverse.com/thing:3473499