We have an O’Day Model 240 with a 1988 hull commissioned in 1989. We sail out of the Sassafras River on the Chesapeake Bay in Md. We are in need of replacement gaskets for the stanchions and blocks. Currently we are sealing with silicon alone. Any suggestions to solve leak problems would be appreciated. We are also interested in a bimini. Has anyone had success with a design that works under sail? Thank you for any help.