No mods and I can hold temps at 220 or 250 based on the following: Load Kingsford (not supposed to burn as hot) and only light like 4 coals and keep all open. When temp is 70 degrees from desired temp (180 for 250) I move the settings to a 3 on top and bottom. when temp is 25 out (225), I move to the top of 0.7 and bottom of "barely cracked". It will continue to rise very slowly to 250 and usually maintain around there.
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