I put a pressure gauge/regulator on my pot. How close is that PSI reading to the PSI at the nozzle? I am running a #5 with my 185 and watched the pressure gauge at full blast and and it does not move, stayed the same. It will probably drop a little after tomorrow. I am adding my pneumatic vibrator to the set up but my research says its the most efficient vib unit out there with an internal exhaust port. Its hooked up to my 12v air valve so it comes on when the deadman is depressed.