I usually do untrimmed spares, but since I was doing some in the WSM, I did a clumsy St. Louis trim on a couple of racks last weekend. They work much better in the rib racks and the pullback was more uniform, so I will probably continue with that in the future after I find a video on how to do it properly. The trimmings made excellent snacks during the course of the afternoon, as well. These went 2.5-1.5-1 and were excellent, but I usually do 2-1-1 in the offset and get very consistent results. I'm working toward a no-foil technique, but so far I keep drying them out when I attempt it.
BBQ Apprentice - Old Country Brazos offset, 22.5 WSM, Various gassers, portable grills, etc.