Mahjong,
Diving a twin PST E7-100 rig, at 5'10", positioned so I can reach the valves, in a SS BP/W, I tend to be a bit head-heavy. Diving them dry in a CF200, with a 400g Thinsulate jumpsuit, I need 12-14 pounds' weight for saltwater.
I'm sure you already know the value of knowing rather than...