I raise my own queens and really don't do a whole lot of it. I use swarm or emergency cells that I cause the bees to make after dequeening a hive(s).
I've converted a few 10 frame deeps to 3X3 queen castles. I just put in 1/4" dividers that go from top to bottom, staple on a screened bottom and use some vinyle fabric on top that can be peeled back on one section while leaving the other two sections alone.
This year I'm batting about .100 and it appears as if I am putting in too many nurse bees. I've gone into the few I've started and the honey/pollen in the brood frame and the other frame I supply is gone and there is no queen.
My typical stocking method is a frame of mostly capped brood, a full frame of honey & pollen and a frame of drawn comb. I add to the number of bees that come on the frame of brood by shaking another frame of open and sealed brood into the section I am stocking.
Should I be more precise by measuring the bees?