Looks good, but next time put your 22 (and Foodsaver) to work and get 4 butts to smoke! I can fit a couple butts on one rack in my 18 (if they're good friends.
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Interesting to see the shape those took. I get my butts at Sam's too but they're a different brand and come closer to square.
I put some Ancho powder along with a little cayenne in my rub. It adds a little flavor to the outside surface.