I have a friend who has replaced several Loc On seats with a rigid seat he made himself. He says it is very easy and cheap so I am contemplating the change myself. Which model Loc On do you have? Once he shows me how to do it I will let you know how its done. I know Loc On sold a replacement seat called the super seat that was rigid but it seems like they were quite expensive. If you ever find anyplace that has Loc On parts/accessories, let me know.