@@RobLovelace thankyou for the reply for i'm going to make this kind of dinghy, a nesting pram by chesapeake. my problem is that i didn't have a plan that's been bought. I will only rely visually on what I see on youtube and on other pictures so i know it will be hard to begin with. your reply will help. i already bought a fiberglass as well as it's fiberglass resin. the only thing i didn't buy yet are the marine plywood for as far as I can see different parts needs different plywood thickness and that's what is still i'm trying to find out.