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No argument with you. You don't need to justify your preferred diving style, not to me, anyway. Safe diving and have fun. That's why we do this, after all.I like sidemount and the benefit of having redundancy, but double backmount is too heavy. I also prefer to use the same setup, and not having to change my regulator from backmount to sidemount and buy another wing to make that possible J
Im not sure if 2 tank sidemount is any harder on boats divers or gear than backount with a couple of stages attached.