A FEW MILES IN:

Today, I painted a long, second story run.  It was the third run I'd done with this new investment.  I was using Sherwin Williams Emerald.  A tough cookie for my four stage.  It shows up on several of cites dedicated to addition of the cup, as a problem child. 

Up to this point, the system labored to move the paint through the 7' hose and didn't lay down as much as I could like.

ON A WHIM:

(1) I took the whip air hose off and went straight to the gun, as with the stock set up, bypassing the air to and through the remote pot completely, as if I was running the stock cup under it.

(2) Too, I grabbed my pancake compressor and a flex hose.

(3) I pulled the connector into which the check valve attached, to pressurize the gun.

(4) The connector fit into the fitting hole perfectly.

(5) I fired up the pancake and set it for about 20 pounds, to push the paint through the 7' hose much harder than the 10 pounds of the gun would push (I can go up to 50 pounds).

(6) I fired up the HVLP with the air pressurizing the pot and started spraying. NO LONGER is thinning necessary and I get good coverage.

I am very happy with the results. Especially since I didn't have to thin at all.