Quote: (Originally Posted by
Genesis)
Anyway, thoughts of those with experience with "both worlds" would be helpful as I start buttoning things up and preparing to actually dive this beast.....
I think its much more important not to have flood, so the less valve in your system, the less holes cutted in your counterlung, the lowest is the flood risk.
On several of my home made Rebreather I ( and first a friend on its own ) are now using a very simple ADV wich is a simple second stage reg with and added disc and spring to turn the exhaust valve into a OPV.
It can seem to be a radical choice but it works fine and its a simple and ( so ) finally secure way.