By the time the firebox burns out I'll be getting a handmade in the U.S. offset smoker. Worst case scenario, cutting disc and grinder. But I would definitely just upgrade the entire thing instead of sinking money into this one.Sounds tight and leak proof.
Might be an issue if you ever need to replace the firebox....
I did the same to my OK Joe. And I have a Hobart welder too! Great job!No RTV here.