Another member of my BKA needed a new queen, and if possible some fresh bees to go with her, to repopulate a queenless colony. I offered him a little cast swarm that had arrived in an unoccupied nuc box the day before. He came to the small apiary to collect the colony before they'd had a chance to get themselves too settled.
It seemed a straightforward thing to do, but the only problem was that the other beekeeper uses National hives, and I use Jumbo Langstroths - the frames aren't compatible. He thought the easiest way to move the bees would be to shake them into their new box, which was a clean but well-used wooden 5-frame nucleus, complete with a frame feeder and some lovely new foundation.
Easy!