this cant be serious? What happens if you eject or seperate from the bike? Do you ride in really dangerous areas?
Why not wear an XXXXL Members only jacket over your gear and shoulder holster?? For added speed of retrieval make one side of the zipper velco attached...hehe
If you are going to fiberglass to the windshield, just make a fiberglass windshield replacement instead. I guess I'm not sure how good a bond you would get to the windshield, but maybe it would be OK. Serpa on the hip seems like less trouble. You aren't going to do much with decent riding gloves on anyway.