I found a YouTube video where they lined up the holes in the air cap with the grooves in the nozzle. They claim it makes the ws400 spray the same as the ws400 series 2. You have to hold the gun a little sideways. It fixes the spray pattern wide open.
I tried it with mine. Its not out of alignment alot. I only tightened the nozzle a tiny bit and it made it line up. I think the gun sprayed wetter. More of the pattern landed wet. I also used it with the fan wide open. I played with all the nozzles at work, lph400 and ls400. They all end up in a different alignment. The gun body machining is different. The ls400 is the most out and opposite of the ws400. The lph400 was in perfect alignment on the ws400.
My ws400 does not have the messed up spray pattern wide open that most do. May be because it's almost lined up. I only put the fan in to speed it up.
I only got to try it on motorcycle parts so it's not a big test. I'm not in the booth everyday. Paint is only a small part of my job.
I tried it with mine. Its not out of alignment alot. I only tightened the nozzle a tiny bit and it made it line up. I think the gun sprayed wetter. More of the pattern landed wet. I also used it with the fan wide open. I played with all the nozzles at work, lph400 and ls400. They all end up in a different alignment. The gun body machining is different. The ls400 is the most out and opposite of the ws400. The lph400 was in perfect alignment on the ws400.
My ws400 does not have the messed up spray pattern wide open that most do. May be because it's almost lined up. I only put the fan in to speed it up.
I only got to try it on motorcycle parts so it's not a big test. I'm not in the booth everyday. Paint is only a small part of my job.