In some videos I've seen where capped queen cells were put into individual cages so that they wouldn't kill each other when they emerged.
I've been thinking about how to make some of these, but I figure that instead of reinventing the wheel I would ask first if someone has a tried and true design, or at least minimum dimensions or tips on how to secure loose cells (like natural swarm cells) into them. Otherwise I will probably come up with something that is bigger and more complicated than it needs to be.
I'm not just talking about cages, but rather cages that are made to be put back into a cell finisher of some kind several at a time. Preferably that could be used for either "artificially" produced (grafted) or natural cells cut from comb.