I’ve been using a California Air Compressor for several years on a small CNC mill for a power draw bar and for Fog Buster lubricant dispersal. The Fog Buster only needs 20-30 psig but the drawbar needs to run at 100+ psig discharge pressure so that’s where I have the compressor discharge set. I use it very intermittently, perhaps a few times per month for several hours at a time and I’ve had two failures so far, one in the pressure switch and another in the pump itself. The company told me that these are not intended for continuous duty, which might be a problem if you are running a business. The assembly itself is fairly easy to service and I had no special problems replacing either the flow switch or the pump itself. I have noticed that the pump gets a lot noisier as the tank pressure exceeds 50 psig, but that may not be a problem for only laser use.