I just smoked my first Q on my new CS 020. I lined the bottom with heavy duty foil. But, I used light duty 12" foil for the heat shield above the smoke box. The 12" was the exact width of the shield so I thought it would work good. Anyhow, I wrapped the foil under the front edge but it wasn't wide enough to wrap on the sides. Even though it was laying flat on the shield and went to the sides, grease still managed to get under the foil and bake onto the shield pretty good. In fact, by the time I went to pull the cooled foil off, the grease bonded the foil to the heat shield and ripped apart when being removed. I ended up scraping off grease / foil.