The other night in a Scott Bonis decompression class he explained why the
long hose is now moved to the right post - because it fixes the problem of
my OOA buddy in front being the victim of my left post being shut down via
rolling the knob along the ceiling - and the fact that rolling along the
ceiling now shuts down the SPG instead.

Given the machining abilities today's manufacturers possess, why do we
continue to deal with this potential of the left post being shut down during
a roll along the ceiling ?

> Why not build the manifold so that the left post knob is reverse threaded
> ?  This eliminates the rolling off problem and it may also simplify
> shutting down either valve because divers would no longer have to remember
> righty-tighty and how to apply it to opposing posts.  Shutting down either
> cylinder would be done by rolling the top of the knob forward... either
> knob.
> 
Are there significant reasons preventing this change ?

Cheers,
Greg


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