I replace the foil in the bottom of the smoker after each smoke, and it was always a bit time consuming trying to cut the exact size I needed and often I'd cut it too small or too big. So I cut out a piece of cardboard that fits exactly in the bottom of the smoker and use that as a template. Now I just wrap foil around the template, cut two sides, and voila, a perfect fit ever time. I also marked the dimension for the top of the smoke house on the template so I can cut that piece out as well.