More interior pic's needed. To me, and I am not a expert at egg restoration but it sounds more like support wall issue rather than weight
from the top. Has it been off it's frame? Shouldn't there be a support in the interior?
Reason I say that is, because you don't speak of any exterior issues, of course it could a combination of all factors. Hopefully one of the restore guys will see this post and help you out. Just seem's like the problem may be interior/frame issue. Snow or tree would probably do glass damage with that much of a bulge. Good luck!
Welcome, glad you found Fiberglassrv, you found a great place! Congat's on your new to you egg. Good luck with the restoration................