Okay, long story short: my wife, requested to bring home a prime brisket from Costco, returns with a mammoth nearly 20-lb brisket! Wow, I've never seen brisket this big, much less cooked one. Anyway, I prepared in the usual way- trimmed the hard fat off it, slathered with French's yellow mustard, generous application of coarse salt (Maldon) and pepper. Plugged in my brand-new Fireboard 2, made sure everything was working, and preheated the 32" KK to within 10 degrees of the desired 275*. Put the