Here in the SW part of the country, tends to get hot and dry during the summers. Was thinking of building a short box, 3" or so tall, that have 1.25" holes drilled in each side, screened, and placed on top of the inner cover on the top super. But then was thinking about rain blowing in and ruining the inner cover and draining into the hive. Guess rain blowing in is common in a feral tree hive, but looking for opinions here as I am new to this.