I currently have four hives. I ordered a new one that I will set up this
week. I also ordered one nuc, one 4 lb box and 2 queens. I did that in
anticipation of winter losses. But all my hives came through fine and seem
quite strong.

I will put the nuc in the new hive, but what should I do with the 4 lb box
and the two queens? The bees are all Russian, and I would like to convert
my other hives to Russian (They are Italian now.) Should I re-queen two
hives, or will that set them back for nectar flow? Should I add the 4 lb
box to the nuc (I have 2 new deep supers.)? If I combine the nuc and the
box, how do I do it and what do I do with the extra queen?

Any advice?