Take my best queen out of her hive and put her in a nuc, with the frame and bees she is on and a feeder. Let the hive build queen cells.
When they are sealed, swap the frame with queen cells for the he frame I pulled with the queen? Will the hive just take her back, as it is queenless and its their old queen? This seems like a painless way for me to grow a couple queens a year to have on hand for splits or re-queening. But I’ve got a feeling it’s not that easy….

Next question, If I put her back, and there are more queen cells, am I prompting a swarm, or will she just kill them....