I do pretty much the same as you do, as long as it works fine.... there is no one right way.
However.... I do want to point out your charcoal grate is upside down. The chamfer on the holes should be on the underneath side, and the bevel around the OD should mate to the firebox. You will get better ash action with it turned over, and it's easier to wiggle too.
KCBS - CBJ
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Oil Patch Horizontal
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Barbecue is not rocket surgery