@John_Yeager I got some famous Jenter Kit.
I had success this year rearing through artificial swarm/splits and did well (Until some nasty person nicked 4 Queens I had carefully raised and were breeding well) 1 went missing and I replaced her.
Several weeks later all 3 of my hives in the out apiary were shaken of Queens and most of the bees.
For each hive - I raised more Queen cells using the egg or day old larva method but the Queen cells were chilled through not enough bees to keep them warm.
The Queens I planned and raised worked well - Emerald was a better provider for getting Queens to emerge than Sapphire.
From Emerald - I lost one Queen to a squashed leg (Faulty Screen BB) so Diamond is really Diamond's Daughter and Zircon, but I'm happy that using eggs or day old larvae is a good method some say it is hit and miss.
I will try the Jenter Kit putting about 10 - 20 cups in the cage and seeing if I can get my best Queen ( probably Diamond) to lay some eggs in the Cage and see how it goes but only after I do splits first.
Celia told me if you are doing the cup kits - make sure the eggs do not dry out when taking out the egg cups and putting them on a rack into the host nucleus hive.
She recommends doing the transfer in the kitchen or bathroom where it is moist