Richard asked "Is there an excluder made to cover the entrance and thus not
have to
dismantle the hive to remove the excluder later?"

I have twice seen queen breeders use pieces of metal with slits cut "queen
excluder size" to cover hive entrances when II (or AI, if that is your
preference) queens are first introduced.  I know that this is commercially
made, but do not know where it can be purchased.  Anyone help?

Lloyd

Lloyd Spear Owner, Ross Rounds(tm).  The finest in comb honey production.
http://www.rossrounds.com