Got rid of the wood rails 6+ years ago but prior to that I off set the rails and used a "sex" bolt to secure the inside rails. The sex bolt was made by my local machine shop by drilling and tapping a 3/8" dia x 1" long s.s. bolt. The inside tap was I think a 1/4-20.I used a fender washer and boat life and have never looked back, no leaks drips or problems. I also soaked the 1/4-20 screw bearing point on the rail with epoxy so the wood wouldn't continue to soften as my crew hung on them.
