Once the stems were in place, I decided to give the whole interior a coat of the latex 'Drylock'. Mistake. You can see below how it seemed to make some of the strips of paper that had been varnished together sort of de-laminate. I then glued and screwed in the keelson. This was also laminated together from two quarter inch thick pieces, but the bottom piece I made about half an inch less wide than the top, and centered underneath it. Once the whole thing was in, this gave me a short 'lip' to put the ribs under while I bent them in place and fastened them at the top with just a single screw into the outwhale. Towards the top of this picture, under the temporary thwarts, you can see some scrap pieces being used as wedges to help the ribs stay pushed up against the paper hull until the glue dried.
The stainless steel nut, washer, and eyebolt (can't see the 'eye' here) were left over from a disassembled garden swing.
Another dry fit of the inwhales and thwarts. I would eventually assemble them all together as one piece on the garage floor, and then staple in the fabric decks, just like upholstering a couch. The fabric is from an old deck umbrella that succumbed to a sudden gust of wind. Once the fabric was stapled onto the inwhales, I glued and screwed the whole assembly in place to the outwhales.
I put almost any kind of filler I could find to seal the stems and the keel to the paper hull: liquid nails, 3M 5200, silicon flashing sealant. All of them were tubes that had been open for a least a year, and the 5200 was more like 5 years old!
The 'nicer' looking thwarts and the swiveling kneeling thwart were made from some scraps of cherry floorboards. After just a quick sanding I broke down and oiled them with some teak oil. It does come out looking a lot nicer than the pressure treated pine does
.And here it is, ready to go!