@CuzzA and @BurhanMuntasser
I'm just curious - how do you route your 40" primary hose? Under or over your right arm? Around your neck? I assume you only plan on vertical ascents for OOG?
Under the right arm, no around neck. I use it in recreational diving only.
Note: I am talking about the SP and the Atomic models only, not the other brands or configuration from other vendors. SP and Atomic version are easy/good breathers no issues with their use or having them on me at all. I have used this configuration in all types of diving, NE, NY/NJ, Cozumel, Pacific all over, Caribbean all over, Malaysia, Middle East, etc.