Hey everybody: I just picked up the Viair 400P auto. Overall I’m very pleased with the unit – easy to use, decent price, light and compact, and fills up the tires very quickly. However the psi gauge is WAY OFF, like more than 5 psi. Which means I have to keep disconnecting the Viair and connecting an accurate gauge to see where I’m at. Not a huge problem I guess, but I’m paying for the gas-station-style gun with the built-in gauge, so if it actually worked it would be a lot better. Anyone else have this problem? Thanks!