Thanks for the tip. I was getting ready to move some nucs to 10 frame hive bodys this weekend, but I think I will build a couple of 5 frame nuc supers and try those to get the additional frames built out quicker. It makes sense for them to build up in a "chimney" rather than build outward, as they are trying to increase hive numbers. Probably holds true overall, but is just isn't as efficient or practical to do so.