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Trim them St. Louis style, rub em with your favorite rub, and put them into the pit at 240 degrees and wait :-D For the first cook forget about foil, spraying, etc. just cook. If your temps are around 240, start looking at them after about 4 1/2 to 5 hours. You should see the meat starting to pull away from the bone on one end. That's the first sign that they are getting close. Depending on the size of the ribs, you probably have another hour or more to go, but things are heading in he right direction. Also, pick up the rack and see how it flexes. It is probably still fairly stiff at this point. check them about every half hour. When the meat is pulled back by about 1/2 inch and the rack bends very easily, they are done.
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