I am doing 4 racks spare ribs tomorrow. Did one today to try out methods (never did 3-2-1 before) and tried some new rubs. I trimmed to a St. Louic cut. They turned out good, so will probably stay with 3-2-1- or some varient of that. Haven't decided whether to trim the ones for tomorrow's smoke or not. What do most of you guys do? Trim to St. Louis or not?