I took a quick peek in the Grey Nuc and saw that the queen cell had been opened. You can see it just to the right of the center see-through gap in this frame:
That's a good sign. I'll let the nuc be for a while, then check for eggs.
Here are the main hives:
I still have to deal with the Green hive's wonky comb. I just put a super of drawn out comb underneath it to give them somewhere to put the nectar.