Oh yea, one more thought. Northern Tool sells a 1-1/4 thick ceramic firebrick in a pack of 6 for $15 that I used and they work great. Here is a link.
Weber 26.75 OTG w/CI grates & SJ/WSM Mini
Home built 24"x72" reverse flow stick burner trailer with 18"x44" grill w/CI grates and upright SS gas oven/smoker.
Home built 48" fire pit with a 30"x30" Santa Maria style ranch grill.
Home built lump charcoal retort, iGrill & a bunch of other cooking toys.