Hi jerra,
I don't think that this regulator works like an on off valve only. In my experience, a singular gauge is good enough, just to estimate the amount of CO2 left in the cylinder. $250 would get you a fairly good deal of equipment at Petmart (Serangoon). I wont worry much about measuring bps because it is only a rough estimation of CO2 going into your tank. I do like to know the concentration of CO2 in the tank, thus a drop checker which is better investment though not the most accurate but it is more reliable than counting bps. Trust me, save the money up bro.
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