I am in the process of doing this on my Falmouth Pilot. I have had to replace the whole cabin side which includes two windows. These were sealed by a u section channel section, long since deceased and possibly the cause of the rotted plywood. I thought that the seal section might be unobtainable but Seals Direct came to the rescue and I am about to fit them back. The outer trim is a stainless steel collection. If you hear a scream, they wont' fit!