Today was fun; the puzzle began to fit together.
Walls were predrilled, glued, sealed with a silicone bead and screwed into the floor. I used the cut off curve corners to square the walls up, clamping all together.
A closeup of the floor wall connection
Some crossbeams helped stablize the walls. I had to move a couple when I realized that where the end of an 8 foot skin board would end.
I carefully trimmed two shelves for the galley; they fit in perfectly