I tried the Nomad and did not like it too much. There was just too much going on around the chest area and the bottles were riding up and down the butt plate bars. A friend of mine worked with Tobin (DSS) on a double butt D-ring and I have these on all my rigs. They basically give you the ability to clip stages to the butt while having enough space for other things. If you keep the boltsnap on a short line, you can really pull in the tank. The tank necks can either be clipped to the chest d-ring or via bungees as in this picture (CCR bailout config). This config works fine for OC as well with all bottles on the left, you really do have space on the butt dring for more, towing a scooter and what not.