I used a Kreg pocket jig to make a table. I found that when I opened the lid the green egg would tilt back. I was fortunate to realize that the three feet would snuggly fit in the gap and by spacing them 1/3 around the green egg in the gap, the egg was secure. Works good. Diameter of hole is 22 inches for large egg with 15 inches from top of bottom shelf to top of top shelf.