Reverse smoker. Pipe vs Steel Plate
My reverse smoker has tuning plates. They completely cover the bottom of my 7 foot pit except for the last 10 inches. I use 3 plates that are 1/4" thick. I butt team all the way against the fire box. System works great. I see no need to weld plate in place. Slide them in, put a handle I the top of them do you can put a poker in and adjust the tune to your liking.
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[COLOR="DarkRed"][FONT="Arial Black"]Baby Arm BBQ[/FONT][/COLOR]