Leaky cockpit-seat hatches
Mine have never stopped leaking since I got the boat. This is a source of never-ending aggro.
For an installation which I later abandoned I had cut out one of the drain troughs on the port side and recently refabricated it in well-epoxied wood. I have yet to seal up the outboard (upper) end of it and it is on a much shallower angle than the original one-- but I don't think the water is coming from there. I sealed up the lower end of the under-cockpit compartment and installed PVC leading straight into the bilge. Any gap under the inlet of the PVC pipe I flooded with epoxy so as to have a clean, level flow for water with no residual dampness. (I do this with all voids likely to catch water.) Today (after 4 days of rain) I found a bit of water in the bilge from it, so I know it works-- but I have been keeping that hatch covered with a plastic drop cloth because I know it admits water from the cockpit seat. Still don't know why.
I think the weatherstripping should be on the underside of the hatch, not the perimeter of the coaming, as it will last longer. Reaching over it and moving gear past it will erode it away in short order. But there is no way to actually see the underside of the closed hatch to mark it-- the port-side locker is too small to get into and look up. KennyH, if you come up with a pattern for installing it, it'd be worth more than a few steaks and beers from me to get to borrow it!