80psi would get mighty sloppy! I never go above 18-20psi and that pushes cuttings well, gives a good flow and that's all I want, not hi pressure. I'm using a small hydraulic pump that'll move about a gallon a minute @ 1800rpm. On .224 bores I still have to throttle the by-pass valve (a ball valve that goes back to the tank) to control flow. 1/4hp motor connected to the pump with a LoveJoy coupler. Mounted on a 1/4" thick piece of steel plate, using 3"x 3" x 1/4" angle iron fabed for a pump mount, bolted to the mounting plate so I have some alignment pump to motor. There is a "T" and valves to direct oil for threading. Bought the pump and Lovejoy coupler of e-bay, spent less than $75 for those, already had the motor. My Gre-Tan plastic cup that goes over the barrel and has the screws to afix it to the barrel cracked after a couple of yrs, so I made a replacement out of aluminum I had in the shop. The Gre-Tan is simple, uses a swivel connection made for air lines. I bought replacement tip off e-bay, rubber blow gun tips. Modified the chip pan, so I have a "drawer" to clean chips out. A paint filter and magnets do a good job of catching the 'fines'. A simple set-up that did not cost much and only took a couple of hrs to put together. My tank is a piece of 12" pipe by 16" tall that I welded a bottom in and and a 3/4" pipe nipple for a suction line. Fabed a lid for it to help keep it clean inside. Simple as it gets, IMO. But it works!