I'm going to be hooking up my new Azoo regulator onto my 20lb tank. This is the first time I've used it. I have the smaller paint ball style tank. On the paintball tank I have to turn it "on" until the pressure reads between 10-20psi. With the big tank do I do the same thing? How much psi should I run? Do I open the tank valve slowly? All the way? The directions dont say what I should set it at. Just not in the red zone...but there are no red zones on the regulator. Thanks guys!