Most of use probably use the little oiless piston pumps for air assists for our lasers so the lens is not contaminated. That is why just using a large accumulator filled from a "shop air compressor" is not ideal even though you may have one feet away. My Idea is to have a scuba tank or two and have them filled each day at the dive shop I used to work at in town (1 of about 10 dive shops locally 20 counting the next towns over). Now this air compressor gets tested twice a year for contaminants and has to pass with flying colors for PADI certification. This is a multi thousands of dollars compressor maybe 10k after they got it retrofitted for Insurance reasons.
So if its good enough to breath at 200 feet and the air is lab certified with a certificate on the wall up to date then I am sure its actually ideal for a laser I would say. Two tanks at 3200 psi would last me all day or more at 10-20 psi. and would allow me to experiment with fine tuning air levels with different cutting. Normal air fills are 3 bucks each but they wouldn't charge me as I make signs for them and worked there for 10 years. Hopefully my workload will outpace the capacity though at any rate it can be used for a mobile solution as we go to Flea markets etc. here in Florida and be a silent solution and leave out all the condensation and noise not to mention extra draw on electricity.
Plus there would be no Noise and it would give me an excuse to play with my arduino (micro controller) more.