Every cloud has a silver lining - introducing QCs

[Sutty]

My most docile hive swarmed a month ago. I hived the swarm, but hadn't examined beyond checking there was brood.
On Friday it swarmed! It was on one brood box and a super it hadn't drawn out.
I hived the new swarm and cut back to 1 QC, putting 3 QCs in an incubator.
I have a couple of nucs where I had nuced the queens of "unfriendly" hives that were preparing to swarm.
I'm thinking to squish the Qs in the nucs and introduce a QC out of the incubator.
What's the best length of time to leave them queenless before adding a cell? Are they likely to tear it down if I introduce at the same visit as squishing the Q?

 

[Erichalfbee]

Whatever you do I’d seriously consider changing those swarmy genes.

 

[Sutty]

Whatever you do I’d seriously consider changing those swarmy genes.

Very docile though, and less "runny" than my other hives. Was a long time before this queen initially swarmed so I'm happy to keep her & use her to requeen my feisty hives by uniting with a nuc once laying.

 

[jeff33]

They tend to prefer their own Qcs so you need to protect your cell. I would probably go back before emergence and knock any EQcs for peace of mind.

 

[Sutty]

Well I did the deed this afternoon. One of the nucs was on the point of swarming with 2 sealed QCs and a few open ones! Removed the Q and QCs and added my selected QC with foil protection. Similar with the other nuc (no swarm preps) but divided into 2 (BS nuc with divider) and added a QC each.
Still feels bad to kill the Qs though! (Especially so close to the jubilee celebrations ).
they emerge & get mated ok!