Woo Hoo !!! I finally found a welding shop that will lease me a dry nitrogen tank that they can fill to 3500 PSI.. I forgot to ask what the CF was for the tank size. But it is the same size as a full size oxygen tank for a welding/cutting set-up.
The price was really “LOW”. I’ll have to fugure what set-up to use for the fill hoses and fittings. Should be doable