Hello Heavyhook. The 2-2-1 method for ribs is 2 hours in the smoker unwrapped then 2 hours in the smoker wrapped in foil then 1 hour in the smoker with sauce, wrapped or unwrapped. Some add thier choice of liquids to the ribs when they foil them. A lot of people, me included, go with the no peek method. Just season the ribs put them in the smoker unwrapped for 5 hours if they are baby back or St. Louis cut. Start checking for doneness at 4 1/2'hours by checking for pullback of the rib bones and by inserting a toothpick between the ribs to check for tenderness If they are full spares they may take longer. The 3-3-1 is the same methodology just different lengths of time.