CGS Preferred XL Cast Iron Option — Large CI Grid on XL Woo/SpiderOur Preferred XL Cast Iron Option Large CI Grid on XL Woo & Spider For cast iron grilling on the XL Big Green Egg, we prefer using the Large Big Green Egg Round Cast Iron Grid on either the CGS XL Woo or CGS XL Spider. The grids size, weight, andmost importantlyhow it sits over the XL firebox make it a smarter, easier, and more affordable choice than using two XL half moon cast iron grids. Why We Prefer the Large Cast Iron (CI) Grid Perfect Match to