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> It is true that when we discussed controversial subjects during my full cave
> diving course, overfilling was not there (we talked about solo diving, deep
> diving, blind traverses and circuits, visual gaps, diver propulsion vehicle,
> but not tank overfilling).

I don't know about the metallurgy end of things but one thing that should
be remembered when overfilling for a cave dive is that you're really only
getting to use one third of that gas for additional penetration. You get
all the risk with a third of the benefit. For me, it's not worth it.

Devon

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