Certainly don't want to rain on your parade, but I've seen a few posts & news articles about some pretty bad pit fires in this style gas & charcoal "duel" pit. I think all have been from folks who walk away and don't tend to the fire or folks that keep the propane bottle to close to the heat. Please be careful and best of luck getting some good Q out of your iron.
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.