I am new to smoking and don't know a lot about "cuts" of meat (seen the chart and know where it comes from but not cooking changes) I was not planning far enough ahead and just got back from the store and they were out of "baby backs" so I ended up with "St. Louis" any cooking changes? Temp or time? any prep changes? Rub or triming? Have some "#1" rub I've heard so much about and going to try it in the A.M. for the first time (sure does make the cupboards smell great!) Also bought a Butt that I was going to use the same rub and put it on the bottom rack and put the ribs on top when its 5-6 hrs before dinner time so we can enjoy something that day (can i stack it like that?). We are doing the butt for sandwiches on Sunday....and Monday...and Tuesday LOL. I'm hopeing all u pros are up Q-ing like me and have some time to help the new-be. Thanx for your time.