So after setting for a couple of months, the keel became crooked. Se the next two pics and the FAQ for how I fixed it.

Keel straightening detail 1.

Keel straightening detail 2.

This is what happens if you let the bottom deck fall to the side while the nose is in the forward keel slot.

The stringer had shifted as I was screwing in the woodscrews, so they only entered the plywood deck.

This actually isn't a f'up - the bulkhead can be placed so that there is an equal amount of space to allow the cabin walls to completely fill the gap.

This crappy picture is of a crack that apeared in the plywood, and the area asound the 5" crack was delaminated. It was on the inside of the rear side panel. I heated it up with a heat gun, slathered on straight epoxy, then mixed the remainder with maple wood flour and slathered that on there and scraped it smooth. I then placed wax paper on the whole area, then another piece of ply held against it with a piece of wood leveraged with a brick. The next day it was solid as a rock, with no more delamination.

Another crappy photo of same.

I tried to have the seat back follow the curve in the deck, but there was no way in heck it was going to. After scrutinizing the video I could tell that the seat back went under the deck at that point. After looking at the plans again I can see that the stringer goes under the deck in a straight line, not following the curve. See the detail photo in this album.