How to get a long, slow burn in Smokin pro w/firebox

[Dr. Strangelove]

Being from Jonesboro(my family's been in the CenTex area since Texas had it's own Navy!) you know there's a "stick burner" on every porch!!
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Well, boys, we got three engines out, we got more holes in us than a horse trader's mule, the radio is gone and we're leaking fuel and if we was flying any lower why we'd need sleigh bells on this thing...