My unit, a standard rEvo III, came with the ADV disconnected when I bought it in 2013. I never reconnected it, in fact, my MOD1 Intsructor who was a factory instructor advised me not to bother. For deep wrecks I have never had an issue with task loading because there was no ADV. About two years ago I finally disconnected the ADV LP hose from the first stage and capped the gas block going into the case, just to get rid of that LP hose as it had no function and was a potential point of failure. A while back I fitted a Shrimp BOV, works great and I consider that another source of DIL and I also can always plug in my Off board bailout tin if needs be, so thats enough sources of DiL for me!