How tight is the liner supposed to be on the upper ring before filling? About all I remember from the first time is that making that final connection for the ring was really difficult, took some brute force, but I concluded that was because the metal pieces, not connected, were longer than they were connected. OR? Is it because the ring was really tight on the liner?
I got a mere 9 inches of additional circumference added and it looks like the liner is stretched really tight, but it's hard to imagine the ring of the frame exerting more outward pressure on the liner than the water does. The first photo is what I was originally thinking, namely 22 x 1.5" = 33" and then at 4 points I would add an extra 1" from 1" thick decking to the other side of the leg. The second photo is a re-think to add 3/4" to each side of the leg. (The idea here is to provide support for a 1x6 shelf around the top on which I will be adding garden hose for a solar heater, plus the right angle might just suffice as a gusset of sorts.) I tried adding a 1" decking piece to the left side of the first photo in between the crossbar and the leg, but that stretched the liner so much that I reverted to what you see.
Also I am somewhat unsure of the strength of the 3/4" pieces. They look like they'd snap under pressure.
Not sure how to proceed. Will sleep on it. Any ideas anyone?