I recently made this from Steven's HOW TO GRILL book.
Not sure if it was the rub, the mopping (I used Steven;s recipe for each), but the smoke ring was INCREDIBLE. Deepest and brightest color I have ever achieved.
I also smoked another brisket at the same time, this one I used a Cajun Injector. It was also a big success. If you like, check out my blog, I have campared each with lots of photos