Just a thought. When I built mine and cut the door out it "sprung" about 3/4 inch, guess it was relearing tension from years of use as a pressure tank. Anyhow, you might want to check the fit, especially after that hot burn, if you need to tweak it a little it would probably be easier before weldingbthe hinges on. A little care now should help insure a good airtight fit.
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.