http://horizontalhive.com/how-to-build/ ... yens.shtml
This is a latest addition to Dr. Leo's Layen's hive project - process of conversion from Lang system to Layen's system.
Now, this is a great case why I chose to go for Dadant frame size vs. the Layen's frame size.
Go to that page and see the instructions starting:
Step 7. If you transfer MEDIUM Langstroth frames,.........
Just look at the picture and you see how perfectly two medium Lang frames tied together fit as-is.
They are just a tad too tall for the Layen's hive.
I realized this last year when I was thinking which way to start building my own equipment.
Why bother myself with so much extra work to go to Layens system when two Lang meduims tied together is what I need - a Dadant frame turned 90 degrees. Never looked back. Lang medium frames are plentiful and cheap in the US to just recycle them into Dadant frames.
Unfortunately, Dr. Leo moved into the Layen's system when all he really needed was vertical Dadant system instead (common in Poland and Ukraine, btw). Nothing wrong with the Layen's system, but it is just a harder way to get to, basically, the same great hive suitable for Northern Region, USA.