You mean circa 50kg/110# for the backmounted rebreather PLUS one or two stages at 15kg/33# each?
Mine's 46kg/100# fully loaded ready for diving. Plus stages - which is is circa 20kg/44# for Ali80s (with regs) or 15kg for Ali7s with stages.
Plus scooter
46Kg? Bloody hell. My JJ is about 30Kg with an alloy backplate. Don't need any lead.