Sorry David, couldn't reply until now, and I owe a debt of gratitude to you and Kevin Kruger. Here's the after-action report:
1. When I pulled the brisket off the cooker, internal temp read 200, but it was still shy of tender. I double wrapped in foil, but before I closed it up I took all of the accumulated liquid from the foil pan I had put below the grate (on the foil-wrapped clay saucer) and dumped it in with the meat. I have no idea if this helped or hindered, I just went with the (literal) flow. There was a huge amount of liquid that came out of this packer and from the looks of it I'm guessing most of it was melted/rendered fat.
2. Sucker sat in a cooler for over four hours. I was somewhat worried about the temp dropping into the danger zone, but there was nothing to worry about. When I finally took it out of the cooler it was at 173 internal.
3. Overall, the brisket turned out phenomenally well, never mind all the drama leading up until I put it foiled in the cooler. It was tender and insanely juicy, with almost a silky texture. Bark on the upper part of the brisket was beautiful. And I don't know if this makes sense, but it almost seemed like the point had collapsed down onto the flat with much of the fat vein between the two melted away. I had trimmed the outside of the packer somewhat before I got started, but I didn't dig anything out of the "V" between the two. I usually remove the point from the flat before slicing, but this time I just started slicing at the far end and worked my way across the entire packer seamlessly. It just seemed to be the thing to do. The entire thing was straight-up inhaled by the folks in attendance, there was not shred left.
4. I had also mixed up a double batch of Steve Petrone's Sauce No.5 while the brisket was cooking. In lieu of adding meat drippings I threw in a small number of mixed dried mushrooms (wife had just bought the jar, they were sitting on the counter), and I think it added a really nice robust touch to the sauce. Stuff got slathered by people on everything.
5. I had some very happy and satisfied co-workers.
(With all the madness, I only managed to snap one blurry cellphone pic of the end result, but I'm hoping to get pictures from some of the others who were there. Instead, I humbly offer the pictorial aftermath left in the wake of consuming another masterpiece...)