Not to derail the OP question. But, I dont move weights around to make up for bad posture. I keep most of my weight center mass (via, tanks, BP, V-weight depending on the kit). But I dont add ankle weights, trim weights, trail weights, etc., to "fix" my trim. I dont move tanks around, or shift weights, or put weights on my shoulders to fix a trim issue.
In the course of a year I'll go from a rash guard and a single alum 80 or single 100 (for beach dives) to a wet suit with single or double alum 80's to dry suit and, again, Alum 80s or 104's, but the location of my weight never changes (I may add a weight belt).