I loved the screen bottom boards for doing mite checks, but they did a number on the bees in the winter [and yes, I closed them, but it wasn't enough] , so I switched to solid bottoms. The bees are much happier and build up better, but it makes mite checks a lot harder.
I guess I could switch to screens for the summer, but that seems like a lot of extra lifting and equipment. Must be an easier way.