I'm interested in how it turns out. Do you think the fiberglass strong enough by itself or will it need any support? I guess you could glass it in with fender washers too since you have the mold. Pretty cool making your own fender. Big props your way.
I think it will be strong enough. I've got it all trimmed up and trial fitted to the bike at the moment and it feels pretty sturdy.
There is some flex in the way of twist, when I get hold of the licence plate end of the fender and try to push it about. I don't think it's enough movement to cause concern bearing in mind that it's mounted to the rear subframe compared to the swing arm like the stock rear fender, which is real harsh.
It's not going to wobble about while you're riding along, or anything like that.
It's good to have a bit of flex, as it helps to absorb shocks.
I'll post up some photos when I get a chance to wheel the bike outside.....It's a bit cramped in my workshop at the moment. Too many projects on the go.