That is coming together really nice. I think your RF baffle is gonna work great. You have probably thought of it but a piece of 1/2"-1" flat stock welded to the end of the baffle will act like a dam and force drippings into your drain.
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.