Thanks so much for posting this information.BTW, a simple queen bank is just a somewhat wide frame with shelves on it to hold a bunch of queen cages. Combined with a Cloake board, you keep the strong queen bank colony's Mama Queen out and can make the upstairs bees queenless in less than 10 seconds. I'd leave them queenless for about 2 hours, then place the queen bank frame in above the Cloake board.
The easiest queen cages to make are Alley cages - a square block of wood 2" x 2" x 7/8" with a 1 1/2" diameter hole drilled in the middle, covered with #8 hardware cloth. CAREFULLY drill a 7/16" diameter sideways release hole. It will need a cork to plug the release hole, and the same can be plugged with candy if you want a timed release (I don't trust candy release - Laidlaw cages are far better).
So, if making up 2" square Alley cages, make your shelves 2 1 /16" wide. I put 1/4" hardware cloth on one side so the cages don't fall out as easily, and a small lip on the front of the shelf. The spacing of the shelves needs to be such that you can get your fingers in to take out a cage.
Other queen cage designs work, too, and you can customize the widths of the shelves. If you start a really large queen operation, you may try to really pack some queens in there, but better success is usually obtained by us small guys keeping the number of queens down a bit - say two shelves of up to 15 queens. I prefer to keep the queen bank population down to 30 queens, but a good strong colony can bank much more than that, especially for a short period, like a few days.
Hope this helps, good luck!