Sean,
I used contact cement to glue the mini cell foam down. I bought the foam from Chesapeake Light Craft. They sell it as kayak seat material. It's closed cell and weighs next to nothing.
With hiking straps you can get out far enough that your butt is actually passed the rail and it feels plenty secure. Secure enough that from that point, if you need to, you can lean way out which makes a huge difference in being able to keep the boat upright in a puff. Sure it's an abs workout, but it's a whole lot more fun than going to the gym.

However, this puts a lot of weight on the back of your thighs. When I had coamings I was getting bruising like about 4-6 inches above my knees all the way up to my butt. I really want to be able to move in and out depending on the conditions. These aren't keel boats, after all.
That shiny hull took a lot of compounding, buffing, and waxing. I touched up a bunch of gouges with gelcoat repair, as well. I was thinking that I needed to paint it before going through all this. I figured if it's lasted 40 years, I'd give it another go and see if I could get it to last a while longer.
That is a gas tank under the rear deck. It's a 3 gallon flat Evinrude/Johnson tank. It's for my little 1974 Johnson 4 hp two cylinder Sail Master.
As for more photos of the boat: I just posted some more in the long-running UPS thread.