A quick drop in on the only beehive I have that has a deep. My other seven hives are all-medium construction, which I hope plays out well for me (so far so good), because I’ve pretty much cut all my deeps down to mediums.
P.S.: Dummy boards are also known as follower boards.
(I’ve created a special tag just for this hive, Giant Hive 2021, so everything I’ve written about it can be viewed in sequence.)