I overwintered 3 nucs last year, just 3 deep nuc's, no supers or anything, I feed heavy in the late fall with top feeders then took off the top feeders and after it was a warm winter and the bee's werer working most of it I added the 2" shims and put baggies feeders on when it got cold, I use top feeders when it is warmer, they worked great, see with the warm weather they went through there winter stores and I knew it would get cold before the spring hit, the baggie feeders worked fine, all 3 nuc's were in 10 frame hives before the flow hit, all 3 ended up with 3 deeps, I have split them once and going to make nuc's with the other depps before long, try before the fall flow, but this winter I have 25 nucs going to winter so we will see, last year all 3 made it so lets try 25 this year :-D ;)