I hope it works out for you! I understand the struggle.
I have one nuc that took a long time to requeen (finally put in a ripe cell from another nuc that resulted in a queen just as laying workers were starting up) and another nuc that is on it's second try (first queen cell hatched but that queen must not have made it back from mating). I gave the queenless nuc the first bar of eggs from their sister split and they now have three queen cells in the works. Have had one dud cell, three new queens not return and four return so far this year. Hoping one of the new cells results in a mated queen and betters the average.
I have one nuc that took a long time to requeen (finally put in a ripe cell from another nuc that resulted in a queen just as laying workers were starting up) and another nuc that is on it's second try (first queen cell hatched but that queen must not have made it back from mating). I gave the queenless nuc the first bar of eggs from their sister split and they now have three queen cells in the works. Have had one dud cell, three new queens not return and four return so far this year. Hoping one of the new cells results in a mated queen and betters the average.