Our bees appear to be doing well. However it has been very hot lately in S.E. MI so they are “bearding”, which is how they cool off. I need to get another hive body on the stack and add a bottom entrance as well to improve ventilation. However the current stack weighs in excess of 100 lbs, maybe close to 150 lbs so lifting it up and sliding a different bottom board under it. I would like to drill a hole in it and put an entrance disk over it, but I suspect the vibrations that come with drilling will irritate the bees.