It has been my experience that it takes more air pressure to pull the paint up out of a cup than it does to let it feed by gravity. I am by no means a expert on anything especially painting, but I like to try, I have a Sharp HVLP and the old reliable Binks #7, the Sharp is about 9 yrs old and the Binks is every bit of 25 and parts are redially available for both. I think the biggest problem with being a casual painter is sometimes we don't get our gun's really clean and then want to blame the gun. JMHO
