Only used it a few times, been busy with kids schedules - graduations, track, baseball, etc.
Did fire it up yesterday and smoked some vidalia onions for another batch of sauce. Had the same results as you by the sounds of it. Guessing i used 3 - 4 lbs of lump, one chimney to bring it up to temp then another an hour later. Had at leas three hours of cooking temps at 230 - 250 with the sfb vent wide open.
Been seeing a few more people doing the same mod too ..... think we may of started something