Thanks for posting, and thanks for being generous. I'm not eligible, but do have a couple of questions: How long does the queen frame stay in and how long does it take for drone layers to give up their habit? Do you get a mess of burr comb around the unit in the mean time?
Well, not sure I can answer all your questions, but I'll share what I know.
First of all, this is not my invention, it came up quite a few years ago on Ebay, but the price was over $30. Not knowing if it would work, I offered to build on for a fellow beekeeper out in Washington who had a laying worker hive. That particular unit was passed around at Beemaster for a while and everyone had good results. Not sure where it finally ended up.
The queen is put into the introduction frame and placed in the middle of the brood nest for 14 days without being disturbed. After 14 days, the plug/cover is removed to let her escape. 7 days later you remove the frame and verify the queen is laying.
You can follow the links above to read about others experiences. I personally have not used it (yet). I also know of a local beek not on the forums that had success using it.