This is not my idea - got it from the Dave Cushman site a fair few years ago. The guys there have never had a failure, and I've never had a failure using this method either.
The kit involves a Crown Board (Inner Cover) with a hole cut into it, big enough to take a mailing cage, and some kind of transparent plastic cover (ex supermarket coleslaw container ?).
This is one I set up today, in the central section of a 3-partition Timing Box, arranged as 4-3-4 frames, with QX dividers between sections. In the central section were placed 1x frame of open brood, 1x good frame of pollen and 1x new, clean, pre-drawn brood comb. On the other side of each QX is a frame of stores - one capped, one open, with the remaining slots filled with pre-drawn empty combs as fillers. Anti-robbing screens are fitted to each entrance.
Here's an enlarged shot of the 'hedgehog' clustered on top of the mailing cage which will remain there for a day or two. The cage - which is lying directly on top of the frame top bars has a solid slide which is currently acting as a floor, to prevent bees from gaining access from below to pull at the queen's legs.
After a couple of days I expect this 'hedgehog' to be much smaller and less aggressive, at which time I'll slide a skewer or toothpick across the cage upper surface. Should the skewer meet with any resistance, then the cage will be replaced and tested again the next day. As soon as the skewer can be slid gently across the cage surface with the bees lifting their feet obligingly, rather than gripping-on like velcro, then this will be taken as a sign that they've finally accepted this new queen. I prefer to then wait a further 24 hrs as 'belt and braces', at which time the mailing cage is opened, and the queen directly released into the hive.
I wouldn't invest so much effort for a bog-standard queen, but for a breeder I consider this to be a worthwhile investment of time and effort. Not one single failure has been reported to date.
LJ