My understanding is that the smoker should be started cold, not pre-heated. I have a #2 and it takes about a half hour to come up to temp--usually set for 225. I typically don't add time for the warm up period. I have used the 2-2-1 method for ribs and they come out tender. During the middle period, I wrap the ribs in foil, meat side down and add a bit of apple juice for moisture.