OK. Some details of a 17.5 foot greenland style kayak I built. A very fast boat. hull is 3mm marine plywood, deck is cedar strips and highlight (white) is basswood. 6 oz fiberglass/epoxy exterior and deck underside. 34 lbs.
First pic.
View attachment 69535 Here it is at first launch on a local lake. I have paddled this on Lake Michigan.
Second pic. Never enough clamps. Building the cockpit.
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Third and fourth. Nail biting time. I had to cut the hatch from the finished deck. Detail of the inner lip that will hold the watertight gasket. I made the hatch so that it is held in place by interior bungies, no external hardware.
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