You do WICKED nice work..
I have seen those, and considered them, but apparently lack the vision I need to see them in a light that would make them useful..
When I put a queen in a nuc and get her mated, she usually STAYS in that nuc until i combine it with a hive that needs a queen, sell it, Sell the queen, or decide to overwinter her in that nuc.
so,, question; What do you do with her once mated? Is it possible to leave her in that little thing until you need her or sell her?