Thanks, not a huge number of results, I got 9,including your message right there and about three other threads and managed to get a basic grasp. Could be worth a try, but it's going to be hard setting it up so bees are forced to move through the hive box. The entrance crevice is quite long and narrow.
So there is a tree with a deep crevice running into it, inside of which bees have set up their home. The depth is such that reaching in I couldn't even feel where they were. So I'm wondering how I can coax them out and capture them.