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>   > A more general question to other 'Genesis' users...How easy is it in
> practise to shut off a free-flowing regulator and open up the cross-over valve
> ? I am not a contortionist and with a drysuit + all the other 'paraphanalia'
> of cold water deep diving I imagine it might be pretty well impossible to
> reach over the back of my neck to turn the two valves off/on. I also imagine a
> fair amount of mental effort (at depth) would go into working out which way to
> turn each valve. Is this a real problem..or trivial with practise?

We don't dive with drysuits here in Miami, but I don't find it 
particularly difficult to turn off the valve for a free-flowing 
regulator.  I have actually had to do it once when a hose blew during a 
descent.  The isolator valve in the middle of the manifold is much harder 
to shut off, but with practice it can be done.  It is NOT possible to 
shut it off quickly; I find that I have to twist it with my fingertips.

The trick to shutting off the valves for the regulators is to point your
elbow directly away from your chest and reach straight back for the first
stage.  Then you "walk" your hand across the first stage and hoses to the
knob.  If you try to reach around the tanks to the knob it's very
difficult to reach or find. 

   Jody Svendsen
   MiG Technologies

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