I used the Mares Ruby and Abyss for my back gas for several years but have recently switched to the Apeks DS4/xtx50 for the right post and the DS4/xtx40 for the left post. I love them, light weight, easy breathing and the first stage is sealed so there is less corrosion potential.
For my stage/deco bottles I use the US Divers Micra. I had a couple of these regs laying around the houses that I wasn't using for anything so I had one O2 cleaned for the oxygen and the other I use on my 50/50. I like them as the second stage is very small and stows easy. They have worked great for me with no problems at all.
For my stage/deco bottles I use the US Divers Micra. I had a couple of these regs laying around the houses that I wasn't using for anything so I had one O2 cleaned for the oxygen and the other I use on my 50/50. I like them as the second stage is very small and stows easy. They have worked great for me with no problems at all.