Hi, David, Anthony and All
 
>Do you have a picture?
 
I haven't seen this double hive myself yet. I have only a profile section
drawing of it made by hand. I scanned it and can send directly for you. The
designer A.Palskys have no neither photos nor suitable for publishing
drawings yet  but he is going to publish an article in a local paper. Maybe,
this will influence for creating serious pictures. He says the hive is very
simple to make and no need for papers.
 
>1. How are the two colonies separated at the brood level - a solid
wall, wall with screened openings or what?
 
A solid wall continuing up to the very top of "supers".
 
>2. How are the queens kept out of the super level - queen grid?
If no queen grid how are they kept from physical contact with each
other?
 
Full isolation by inner solid wall.
 
>3. accessing the brood frames through the super level after removing
6 or so super frames sounds awkward to say the least; but how is this
possible, surely the ends of the frame tops will be trapped between
the two levels of box - unless the upper box has larger internal
dimensions which implies over large bee-space at the frame ends?
 
It's really awkward and it takes more time. But positive results request
more strength of a beekeeper. Two additional not fixed boards per one colony
are used - front and rear of suitable thickness and height in supers level.
(Four boards for one hive)
 
>4. Is the two queen principle used because they stimulate each other
to lay better or is there some other reason?
 
In the List (Bee-L) some member witnessed the positive influence even via
board. As well, the two blocked hives with a common wall save heat. The bees
of both colonies are quite separated. This isn't  a case of real two queen
colony with common bees.
 
Good luck for those who "have hands" :)
 
Rimantas Zujus
Kaunas
LITHUANIA
 
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