George,that 10 lbs is at the CAP, where the paint and air comes out. What I didn't make clear is you have no way to measure that with out a special air car that has a gauge, forget about it. "At the gun" is refering to the gauge you would have at the air inlet to your gun. I have no idea where that 100lbs would come from, I have never seen an HVLP gun that needs or could use 100 PSI.
What brand is it?
