I have seen and read data for an 4500 psi air compressor made by the firm that makes snow peak air guns. I came across it in one of Steve's AEAC videos. Essentially a regular shop compressor drives a ram to compress air to 4500 psi. a couple of gaskets and a couple check valves, no cooling issues less o rings ect any shop compressor can power it. like to get the name of the company that makes it.