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Charlie,
I tend to disagree.
I think often times the alternate is tuned to the same cracking pressure as is the primary.
Now, when the alternate is suspended on a tether with the orifice pointing UPWARD, the tendency for it to free flow is magnified.
Just a thought.
the K
I think octos are poorly made regulators not designed to be used. They may help save somebody's life, but they wouldn't be fun to dive with.
I think there is a reason that tecnical divers use good quality secaond stages instead of octos.