I have just glued up the third keel frame on the floor jig as the first and second frames produced this way are a good fit to the stringers. Because the frame is glued up square to the jig and the gap between the stringers tapers a taper has to be planed or filed onto the edge of the frame for a perfect fit. The taper is negligible near the keel where the maximum strength is required and the manufacture of the frames on the floor is most convenient.
Clamping blocks screwed to the particle board floor ready for clamping the third keel floor