Something to ponder. Not all that long ago and in some places today still, barbecue is cooked over an open pit and fire is regulated with a shovel. Offsets, ranch boxes, drums, ceramics, pellets etc attempt to achieve this open pit method in taste, tenderness and appearance. Pits if covered at all used cabled lids, siding, cardboard, hell everything leaked, and the Pit master used that to his advantage. True barbecue requires a shovel. I didn't say that, but several barbecue folks have. Don't let a little whispy blue bother you from a present day modern Pit where metal hinges, lifts and separates by design (high dollar cooker leaking from a weld exception).
Shovel, real barbecue requires a shovel
But hey, what do I know?