Mini nucs - the way i look at them is they are just for getting queens mated, end of story, once she starts to lay then she is removed into 5 frame nuc and a new Queen cell added to the mating box. Bees will abscond when the heat and or population gets to big, and of course dare I mention the alleged "mating swarm" . I use the EWK type nucs home made and dead simple to use.