Im going to smoke a few racks this weekend and was wondering...It appears everyone agrees ribs cook to time and not to temp, is this true? or is there a temp we should also shoot for. The other question is...after the 3-2-1 method is done is it ok to keep them in the smoker at a lower temp? Will they just get more tender or will they just toughen up? If it is ok to leave them in should I foil them again or just leave them out on the rub racks? Thanks in advance.