I am looking to build the above OH from the plans on BeeSource. But I have a really dumb question (ok, two dumb questions) about the construction of this OH:
1. What are the 3/4 inch holes in the sides? I assume they for ventilation but the plans don't mention covering them with #8 hardware cloth.
2. If the side glass is flush against the sides of the top bars of the frame, how do the bees move from one frame to another in a three-frame hive?