There are many ways to use the divide&conquer. Normally, put the main rack right on the top of the fire ring, then set the half moon pizza stones right on the bottom of the rack, which could provides a total indirect cooking surface, and allows the heat to rise up around the edges. And then fit the top accessory racks down on the main rack. after that, get the half moon grills, put them on the top of the main rack. In a word, The divide&conquer creats an excellent surface for low tempeturate cooking and high-heat cooking.