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I can be a bit of a bonehead as I seem unable to remember something. I would
like to find out the following: has a manifold with or without crossover
ever failed underwater?  If so when, where and who?  

It was my understanding that the concern over manifold failures is
misplaced.  Any tweaking of the high pressure seals in a manifold is likely
to result in a problem that would be evident before the dive when the
internal pressure of the system is at its greatest as would the torsional
stresses to the rig. The real concern should be over simplicity of operation.  

I'm not really offering an opinion since I don't know who tri-mix is ;-),
but I do dive doubles with manifold (w/ crossover) and often solo.  Hell, I
swicthed from diving the doubles as independents because I thought my fears
were misplaced (mechanical failures vs. ease of operations).

Regards, John

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