How hard is it? I have an old fiberglass 5wt that I'd like to use, but the reel seat is worn and the rings won't hold a reel for more than about 2-3 casting strokes. I'd like to replace the seat but I'm not sure how to start, or if it'll even be worth it.

Any help given is greatly appreciated. I'm at work now, but will try to post pics of the seat later this evening.