I might have this in the wrong section, but I saw a video on utube (As you do ) But the chap had a Q/E in the brood box to secure the queen and select larvae for queen breeding I think he called it queen castleing.
Anyway the question would it be a good idea to confine the queen to say three frames in a regular brood box be inserting a vertical Q/E between her and the rest of the bees, that way you would always know where she is and there would be no danger in rolling her or squishing her. I know there would be a bit of manipulation required every time you open the hive swapping frames in and out. What would the disadvantages to this be if you were not using it to raise queens.