Here's my first impressions using it in vp20. It's kind of a direct adaptation of how I used the same tool in Resolve before Vegas ever got Color Grading. Fwiw, I went back to Resolve to refresh my recollection of how I used it there and I forgot how clunky it still is.
I may have accidentally revealed more than I should have, lol... oops... hang in there, if it isn't in your build of VEGAS, it probably will be very soon.