Is anyone using the Thunder Products Dial-A-Jet and Snorkel kit that goes with it?

What do you think of it compared to just re-jetting? I a running the DJ122 Main and the low end on my Vinson is GREAT now, but top end is not what I was hoping, seems rich, but with the 122 main, maybe lean?? Not sure?? Does the Dial-A-Jet make it easy to adjust top end or is it for low or what??

I have a 2007 Vinson with a few mods. Is it worth it?

Thanks in advance!!