Entrances. It sounds like a fairly simple issue. But as a beginner I found it anything but.
From the simple discovery that floors vary in size so you need to buy the correct entrance size to suit your floor, to wasp excluders that did a superb job of keeping wasps out but also made it impossible for the bees to eject detritus and dead bees, rapidly leading to an almost blocked entrance. I'm always surprised how often seemingly simple issues lead to such complex considerations.
So you ask an important question. Thanks. I'm reading the responses with interest.
