I usually sear after using low heat to bring my steaks up close to done temp(rareish) then I open bottom vent all the way, give the SnS a good stir with metal tongs to move lit coals around and give it 10 min to light the rest. Then sear away till done. Amazingribs.com has lots of good tips for using a kettle. A digital meat thermometer is your best friend for cooking.
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