When requeening, I've experienced a good way to check the way the new queen will be accepted. I just lay on the top of the frames the queen in its cage without her servants . I sit and watch, with no smoke. After a while, you will check the way , the colony will cope with her new queen. If they welcome her, I wait just another while and I open the cage right away. If it's agressive, I don't let the cage inside either. It works quite well about 90% ...