I drilled holes with a step bit. Bunch of them. One grate sits perfectly in the tamale steamer location. I put the top grate five inches down from the lip. Installed a thermometer 6 inches down for ease of grate removal. Make sure to use only three stainless screws for the top grate support about 15" apart. 4 support screws will inevitably be uneven.
Primo XL, Pit Barrel Cooker, Mini WSM,Lodge Hibachi
Craigslist finds Tiernan SOB, New Braunfels Black Diamond, Big Green Egg Mini
By the way, did she mention my name-just in passing?