I would like some feedback on your experience with upper hive entrances. Just got back from Spain and saw the original "mellifera iberica" in action (speel checkers may fault me- you know Spanish Bees). Fascinating to see the original american import. They are dark, large and not so mellow with lots of woldflowers to pollinate this time of year. The comercial beekeeper there didn't use a bottom board entrance at all, just a slot at the middle of the brood box. I think a reduced bottom entrance and an upper brood box entrance might be worth using but would like to know what others have experienced with this strategy. Thanks.