Welcome to Ecomodder.
Time is either speeding up or stretching out —I don't remember the post at #10 at all.
I watched the video again and what stood out this time was the inflating mechanism standing proud of the sidewall. I proposed a design that has a rigid floor, but was to use a passive inflation system. Those scalloped openings are apparently overkill. More recently I considered retractable fiberglass rods.
