so.... i loaded up the WSM with coals at about 10am yesterday morn to prep for ribs to be ready to eat at about 5-530pm... dumped a small amount of lump in the ring, filled a chimney (a small generic one), fired it up and once they were good and burning i dumped it on the small pile, covered with a ~little~ more lump, 4 chunks of hickory and got t up to about 325... poured water, added ribs, temp came back down to 230° perfectly and held it until about ribs were done at about 430ish... pulled everything off and covered the WSM, well, when i left my brothers place the grill was still holding about 240° at 10pm... unreal!!!! judging by the amount of coal still left I'd venture a guess that it probably held that temp for another 4-6hrs... I've really gotta learn how little coals i need for this thing... hehehe