My plan is to run a York to a manifold that will have a pressure switch, a gauge, the two ARB solenoids, a safety valve and input and output lines. The output goes to a tank that has a drain valve, another safety valve, and two outputs, one to each end of the truck (to quick disconnects on the bumpers).
I already have the York, tank, manifold and various components, my question and poll stem from the fact that I wasn't sure what kind of pressure I should run the system at so that 1. I can air up and use tools effectively and 2. safely and reliably use the OBA to power my ARB's.
Initially, I was going to tee the ARB's off with a pressure regulator so the ARB's operated at a safe pressure and the rest of the OBA system could run at higher PSI's, but consensus seems to be that if I run the whole system at 90 PSI I'll still have enough air for my needs.
My only two obstacles are 1. I want to keep the system as simple as possible, and 2. I don't have a TON of space in my already crowded engine bay.