I only use one regulator at the gun. Paint will not even think of flowing until it reaches around 45psi but I think that is normal..again it only gives me a cap pressure of 10psi which i think is equivalent to 35psi at the gun. Wondering if that toilet paper roll filter is restricting air flow and causing it to sputter. Tank does seem to run a lot. Maybe I am not doing a good job of making sure it is coming up to pressure before spraying but then again if it has 45psi at the gun does it really matter what psi is at the tank? Reading some more threads on another site and someone is talking about how important it is to have High flow volume.