This looks very promising, good jig. A little tip try to screw the keel to the bottom plate of your shipyard, because when you start gluing the frames your keel will lift fore and aft. I asked a carpenter why this happens, his answer was: It happens because of the moisture in the glue, the wood works at this point and dries faster than the wood, thus creating tension in the direction of the wood grain. Due to the glue, the wood cannot go back at this point after it is dry and you get this curvature.