Not to make anyone jealous or anything like that but, being a volunteer firefighter has it's HUGE advantages for us PCP-er's.
I have access to "They are all linked together with a maze of hoses and gauges..." (Pete, it's a cascade system) that is attached to a 5000 psi compressor.
I take my 4500 psi Benji 90 cu in bottle ever Wednesday (weekly meeting/training) and top it off. Fire Hall is three miles from the house; if I use it up the 90 cu in bottle doing CHRONY work and/or plinking over the weekend.
Have access to old SCOTT 3000 psi SCBA, which I might get AIR VENTURI SCBA fill hose and inline pressure gauge in the near future.
Getting JEALOUS YET?