Oldognewtrick, yes we real painters never use a tray and I have never done the W. Been painting over 40 years never seen anyone do the W. Where the hxxl did that come from. Most likely from some makeover program on television I suspect. In the video above, the "howtopaintinfo' guy is a pretty good painter. I can tell just by watching him, although I do it slightly diffenet than he does ( https://www.youtube.com/user/InvinciblePainting/videos
) if anyone's interested.
Trays in my professional opinion are an absolute wast of time if you're doing this for work. For the diy it's ok, JUST! They're cumbersome, difficult to work out of, don't hold much paint, difficult to move, easy to walk on, absolutely useless they are.