I just got a PST (steel) LP72 (DOT-3AA-2250 - born 1981) and tried sidemounting it (along with an AL80) in the pool. Filled to ~2200 it just would not ride right. No side to side roll versus the 80 on the other side but the 72 would roll up like it was tail light. Swam around for a while trying different rear attachments. When I took the 72 off with about 1600 psi it stood straight up on its valve on the bottom. The AL80 with 2500 lay flat on the bottom. This is much worse than my Faber LP85s that just start to get tail light at about 1600 psi.
I have read that these are great sidemounting tanks, but this one is too "floaty" in the back. Is it just this particular PST 72 or all they all the same? Are the somewhat newer 2400 psi steel LP72s any better?
Was hoping to pick up some cheaper, lighter, lower capacity sidemount tanks (read that the older steel 72s would do it) but this one is not that good. Those of you that sidemount these older 72s, is this typical, do you use weights on the rear or just attach the middle/rear of the tank to a waist D-ring (or what)?