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> > >Good choice, several of my friends have had CO2 buildup problems with 
> > >the USD at depth (headaches, etc) the USD second stages are totally 
> > >unsuitable for deep diving (+100 feet).
> > 
> > Really?!  I've had my SEA down to just over 200' and never a problem
> > yet, however it can be a little more difficult to breath at those
> > depths, but not so much so that I'd call it a *big* problem.

Sorry to disagree, but I know alot of people up north here that are diving
with USD past 200' in very cold waters and they will dive with nothing else.
Also I just reciently talked with some people from the US Navys
Experimental Dive Unit (They do all the test on regulators) and they
prefer USD over any other regulator.

Markp 

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