That’s the beauty of a BP&W, you can adjust the harness to fit a 3 mil or drysuite but with steel doubles you may want a larger wing.
I actually have two set ups, a plastic BP and a small wing for travel and a six pound stainless steel BP from FredT with a thirty pound wing for cold water. I move the OMS weight pockets to whichever set up I’m using.
Be sure to look at Deep Sea Supply’s site.