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I wouldn’t replace, just add. Each tool has its function, although some uses overlap.
I started with the BFK, and since added shears, Trilobite line cutter, and small sharp knife over time. None are located together so one should be accessible if entangled. Other implements of destruction come and go, as needed.
Some of the paranoia is because I’m a solo diver, the rest I was born with. YMMV
Bob
I've actually replaced my shears with the seatbelts cutter style trilobite cutters. They're smaller, and work pretty well.