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>George,
>
>you said:-
> > Nobody uses steel stage bottles... 
>
>Why not?  Over here in UK, I haven't seen anyone use anything else but 
>steel.  The most popular being Faber lightweight 10 or 7 liters ones 
>(approx neutral when empty, WP 232bar/3500psi ish , 80cu ft or 55cu ft).

Remember that Al. cylinders of any sort are not that common in the UK, and
those that are available don't really seem to correspond with the US ones.
I wouldn't use them cave diving because the ones available here are bigger
and heavier out of water than their steel counterparts, and I've got to
carry them down the cave. Add the need to better protect them from damage
during the carry in, you end up with a huge mega-heavy lump.

Neal

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