I am sourcing materials for a build. I already have a 155 gallon propane tank. But I was wondering, since I dont know a whole lot about metal alloys, does it matter much which alloy of steel is used for the baffle and firebox? Like it seems to me that A36 is the cheapest. But would some other type of steel be better suited? I dont really see a need to spend the money on stainless. Thanks for all your advice.