The second frame to build was Frame A, which is the frame that is under the cockpit seats and forms the waterproof bulkhead between the main cabin and the stern chamber. This is a 'full' frame which is a single piece of plywood with the douglas fir parts attached. In theory this means that it's pretty easy to build - just glue the solid parts to the already-marked-out part of the plywood piece and then add the knees afterwards. In practice it's not actually that easy. Screws can't be used to fix the solid parts to the plywood whilst the glue cures because those screws need to be put in from below and the frame is a bit unweildy to lift up and put the screws in while the glue is not yet cured.

My initial plan was to use the plywood to set up the outer Johnson-Oliver blocks, remove the ply and add the solid wood parts, fixed with inner Johnson-Oliver blocks then attache knees, flip over when cured and add the plywood. This should have worked but getting all the solid parts fixed (accurately) seemed to be pretty difficult so instead I ended up gluing and fixing in place with clamps, adding knees when cured, then flipping and added the screws for the already-glued plywood.

The final picture shows the frame epoxied and then sanded to key it ready for future paint coats once the hull is built - that's why it's a more matt grey colour. I'll do this for all frame surfaces that will end up being painted because it's much easier to do them now before the frame is actually in the boat.