I have been made aware of the possible sale of a 3500 psi cascade air system. It was used by a local volunteer FD to fill scba. But their new gear is all 5000 psi, and they upgraded their compressor as well. I've been told that I can probably purchase the whole system for under $500. Including the cascade tanks, and possibly some scba tanks. This would clear the way for me to purchase a pcp rifle, since the thought of relying on someone else to fill my tanks has always stopped me before. Does anyone have experience with this sort of system? I have the 480v electricity available to run it. But little first hand experience dealing with this much air pressure. Advice?