I have some photos of the helmet from FIDM that I'm not allowed to share at the moment (I'll check with my friends). But I can see from these photos that there is virtually no lip on the front of the screen used helmet. So I guess I'll grind that down as far as I can without compromising the integrity of the helmet.
The screen used helmet also appears to be lined with a maroon-red leather. The ear pieces seem to float freely, rather than being glued or attached directly to the plastic helmet (fiberglass, whatever it was made of) itself. I can sort of see a gap between the ear piece and the helmet in my friends photos as well as some photos taken at the earlier exhibit (Australia?)
I believe I can see an extension tab of leather inside the helmet that comes down and snaps onto the leather liner of the ear pieces (they are either small silver snaps or rivets.)
The real ear pieces are actually hollow, almost as if vac-formed but I don't know that vacuforming can pick up that kind of detail. They were probably just sculpted or cast to be hollow? So the leather on the ear pieces appears to be cushioned with some fiber fill or batting. I think they are supposed to be like
headphones!
DCB's/MonCal's ear pieces are not hollow so I don't know how the leather lining + tab technique could work. And leather tabs alone might be too flimsy. I almost wonder if the leather tabs are covering something more sturdy like metal extensions that might be anchoring the ear pieces to the inside of the helmet? I just worry that the binocular armature needing something really stable to anchor on to, not just some ear pieces that are hanging in place.
I guess that was my very long winded way of saying I think I will try to anchor the ear peices using some kind of tab on the inside of the helmet and maybe add the maroon leather for that headphone effect.