Oil canning????

I would clamp it heat it up and quench it with wet rag and try to shrink the metal to take the bow out.
Thanks

Did you clamp that down while you were welding? Maybe clamp it down, heat it up and the release the clamp after it cools down....

Was not clamped down while welding on it. Was hoping to weld some exhaust tube on the lower corners to shield the thermometers I want to install but that ain't gonna happen now. Will put the thermometers on the body of the smoker.

Have a neighbor that does bodywork, may just go visit Mike and let him try to get it straighter.