I have a Devilbiss HVLP gravity fed conversion gun. I'm relatively new to spraying and often struggle with selecting tip size. I'm spraying a waterborne lacquer that empties from a ford cup in 12 seconds. I have a chart that says I should use a 1.2 tip, but I've also read that it's necessary to go up a couple of sizes when using waterborne finishes. Can anyone who sprays waterborne lacquers regularly provide any guidance to a noob?