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Thanks. I didn't know how flexible the globe would be, so I thought it would be a good question.
For a slightly greater budget, and considerably better durability, would actual rivets be a good idea?
If you want to have a closed face, you could add a life support backpack, pipes, and a battery powered computer fan to ventilate the helmet. Make sure that the switch for the fan is easily accessible. If you want to get extra fancy, you could build the switch into the visor hinge, so that it turns on when the mask closes. But that seems like too much work to get it to work reliably, and besides, it's fun to have a bunch of forearm mounted switches, even if only the fan switch does anything.