I need to replace the stringers in a 16' Dixie Devil tri hull that I just picked up cheap. I have experience with fiberglass and resin so that part is no problem. What I am wondering about is attaching to the hull. I have seen web videos that say you need a cushion underneath the stringer to prevent cracking. Also I want to know if I can use composite plastic decking for the stringer instead of wood. No rotting properties so I figured it would work the best for a new floor. Then I also thought about thicker plexiglass for the floor instead of wood which you have to seal. I am not 400 pounds and don't think I will have anyone ever on my boat over much 200 pounds.