Thanks for the links, Spuds. Interesting info.
Only thing I can think to add is :
1)to not put briquettes in the center of the oven, neither top nor bottom. Arrange them in a small triangle around the center to avoid developing hot spots.
2) remember to turn the oven 1/4 turn every few minutes, then turn the lid the opposite direction 1/4 turn, again to avoid hot spots and provide even heating.
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"Most men take the straight and narrow. A few take the road less traveled. I chose to cut through the woods." ~Unknown~