Don't bother with the foiling, Hook. Just put the ribs in, with a water pan and 3 oz of wood, and close that door for at least 4 1/2 hours. Start checking, and pull when done. The "no peek" method is killer in these smokers! People foil to overcome the effects of the drying heat source (wood or charcoal), and it's not necessary in the SI. ...THAT'S why we call it "Lazy Q!" 8)