Adrian- I used my limited carpentry skills to make a bunch of 5 frame boxes and am planning on wintering them as 2 story 5 frame nucs. When you are pushing them together will you be sharing a cover of any sort for winter? I definitely think that there is more money in selling bees than in selling honey but I have not overwintered nucs in the past to know of an average survival rate. I always thought we could not sustain nucs in northern winters but I am eager to see what this winter brings with my 10 or so nucs. First year I am actually looking forward to winter!