I have developed (of all things) a SEVERE head-down trim condition in my single-tank cavern rig while running shallow…

Givens:
95 steel with H-valve
Stainless steel b/p
DR Venture Cell
Wreck Canister, right belt mount
3# lead in Clipper pocket, left belt mount (to counter roll from battery)

I was diving a VERY old 3/3 combo, and trim was a tad head down but acceptable; now diving a 5mil one-piece, and find it difficult to NOT assume dancing on head posture when 20’ or shallower…also, unstable in roll axis (wanting to invert until past 20’)

Suspicions:
The new suit has moved the CB down towards legs…
The small size of the cell prevents the CB from moving “up” relative to CG of tank until sufficient gas is input…
Shorter tank moves CG forward towards shoulders, acerbated by s/s BP (I noted LESS problems with an AL80)…

Possible fixes:
Ally b/p (moves CG aft)…this would unfortunately mean I had to carry more lead…
Traditional wing (Trek is next size up)…this would move CB aft, but in a single tank, I fear the dreaded “Taco shell” config…
Ankle weights…UGH!

Do any of the fine-trimmed Readers here have other ideas/comments?

Thanks!
Norm