A week ago I hived my second bunch of bees, in a kenyan top bar hive. For an entrance I just left a 1/2 inch space between the first and second bars, which worked fine until the rain.
I think the bars swelled slightly, reducing the gap to 1/4 inch. Is this too small ? I went out in the rain and the roof does keep the bars dry, I think the swelling was from general humidity.
The bees are coming and going all right, I did notice a bunch of drones buzzing around the entry, but not really landing. This could also be my imagination, I guess.
I don't want to change the width of the bars to increase the entry, so I am going to shave a bit off the top of the follower board if the entrance needs to be bigger.