+1 for the dss set up and all said about tobin. i use a torus 27#. it has the sta built on it. I also use a oxycheq 32# on ti. The oxycheq also has the sta built into it. The biggest + other that what has already been mentioned about dss is thst you can get optional two 4# plates to attach to the plate . the 8# for me is just right for ging from fesh to salt water or from wetsuit to dry suit. For me a slight downside to the tours 27 is that the fill hose is centered on the tank valve. The oxycheq is more on the left shoulder. It is a preeference issue and neither config is right for everyone so look at them both.