All the comments reminds me of dad's shop. He plumbed it with 1/2 PVC pipe. Twenty years later, it was still holding pressure. But we limited pressure to 40 psi. Once in a while we would increase it to 60 psi to use the air drill we used. For any other air tools, there was a tap off the tank we would use. Amazing none of it blew up.
On another note, the place I worked at Huntsville, TX, that 20,000 sq/ft facility was plumbed in with 2" PVC pipe also. It did blow one day, an ell gave way on the pipe coming from the tank outside. Blew out ceiling tiles, insulation, wires, etc., all over the place. I don't know if any of that piping ever got replaced or not.
I'm liking the idea of DYI using PEX tubing with brass fittings that you can get locally from the big box store. Really have no need to run over 100-125 psi. Some more to think about.