new to forum, so sorry if this covered. i read on net that adding a piece of charcoal in woodbox along with wood chunk(s) would improve smoke ring. is this OK to do with cookshack supersmoker? operator's manual says do not use fuel such as charcoal briquettes. i love my new smoker & don't want to damage it, but i'd like to try the charcoal idea. i've been very happy with results even without the charcoal, but always looking to improve. anybody have any guidance to share?