I've got my hands on a 5 frame nuc which is completely full. one of the girls got me good and proper on the tip of the nose last night when I was closing it up ready for the move

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full. there are three frames in there, and the rest is a mess. the current plan is to put in on top of an eight frame box full of frames, and then put a board either side of the nuc to cover the gaps. I'm hoping the bees, and more importantly the queen, will to move down closer to the entrance and start building comb there. I could move the three full frames down into the 8 frame box, but they could build more comb in the empty space which would be annoying.
do they usually move down in this scenario? well they need more space and have nowhere else to go (if I leave all the frames in the top box. so I assume so. Once I get the queen in the bottom box I can but an excluder above it, wait until all the brood has hatched out, and then remove all the messy stuff. sound like a plan?