I know you asked finsky but here's what I do, is I make the nuc up the day before i install cells, I take a frames of honey, pollen with bee's on it and 2 frames of capped brood with bee's on the frame, the next day I put the cell in the hive and inspect a week later and look for the queen, then to see if she made it back from her mating flight and start laying ( I will always be looking for her during this time), if she didn't and I cant find her I will load another cell but you have to be careful here because she has 2 weeks to mate and if you look in that 2 week spand she maybe on her mating flight then so its best to wait and see. building nuc's day before you want have a laying worker.
something else I seen this year if your nuc ends up with a laying worker we loaded a Q-cell in the nuc and 2-3 weeks later she was laying like crazy, guest they killed the laying worker or it stopped laying, not sure but the new queen took over the hive.
I always forget little details when typing stuff, I could show you easier and never miss a beat ;)