Stepping away to think, inspecting plans, and spending time in the 'moaning chair' tends to reboot the building process. Or at least it seems to have done in this case. Yesterday's confusion was resolved by the process of proving the building frame with battens and in so doing, developing a stronger belief in the lines of the boat.
I'm not entirely finished with this process, but it has helped find the correct position of the transom and improved my understanding of where things will come together (the plank landings, especially at the stem, and also at the transom. A lot of beveling to do at both places.
I think this would be a good time to varnish the transom in preparation to actually attach it to the building frame for planking.
I also glued the stem to the keelson today.
about 3 hours.