As stated make small changes it takes about 15 min to see the results of a change. Try and catch the temp on the way up, it is easier than wrestling to get it down.
Start with a Full Basket of Lump 4-5 fist sized chunks of wood buried in the lump. light up 8-10 briquettes in a chimney, once ashed over place on top of the lump let it sit 10 min as the lump catches it will start "snapping" . Lower the basket in the drum, Open all the intakes and wait 5 min to warm up the drum, put on the lid open the exhaust. Watch the thermo when the temp gets to 150 close off 1 intake, at 210 close off the next one and choke the valve by 1/4 and let it settle in for 20 min make final adjustment as necessary. YMMV
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