Free boat plans for the backyard home builder, plywood and wooden sailboats, rowboats, dinghies motorboats. Intro: sawfish, an unsinkable, lightweight, foam kayak (23 lbs). free diy kayak plans, the hardware store boat. do you really want a kayak? want one so bad you can. Diy stitch and glue drift boat building – online plans & blueprints one-off wood/fiberglass and all fiberglass construction purchase a $25 dollar plans and building.