Saturday, April 28th, I check the hive that I'd made queenless a week earlier. Found queen cells on 2 frames, so I split them between 2 hives. Hopefully not destroying all the queen cells in the process. Gave the new location some extra frames of brood from the queenright split from the previous week.
So far the new split isn't flying, of course, but no robbing either. I worry about queenless splits. The OH that was split Wednesday took 2 days for its first queen cell to appear and 4 days for the second (and several more.)