Well, I took the gun apart again, worked with the regulator a little, and put everything back together. The paint now flows consistently..sort of. It seems like the air pressure has to "ramp up" for a few seconds. Sort of a waste of paint if I have to deal with that, but once it gets going, it appears to spray just fine until I let off the trigger for more than a couple seconds. That said, I haven't tested it with anything other than water just yet. Anyone have a high quality in line regulator to suggest? I'm assuming the one that came with the gun is pretty low quality.