I have 13 Russians and 1 Italian. I should say all my Russian stock started from a few RHBA queens so some are daughters of these and open-mated. Several were late queens with no more than a softball-sized cluster going into winter. Everyone stopped laying in Nov and by Dec 10 I didn't have any eggs/larvae/pupae.
One tiny colony that was robbed of resources while I was out of town currently resides over a strong hive on a double screen board. I have sensors in many of them from least to greatest. So far 14 of 14 are alive. I did several things this year I hadn't tried before. I had several in EZ-Nucs and didn't think they would survive a TN mountain winter (zone 7a I think). I put them in Lyson 6-frame poly nucs which helped dramatically with resource conservation/heat loss.
The Lysons have a lot of space in the top if you are not using the propolis trap (kind of a queen excluder looking thing but with smaller holes they would tend to plug up). I used this space, as well as making 1"x3" feeder rims for the 7 wooden hives, to hold brick sugar. Some have taken to the sugar, some seem to be less interested in it. Throughout the year I would find an Italian hive queenless or faltering and I would drop a home-baked Russian (hybrid would be more accurate) queen or nuc down in it.
February will tell the tale. May not have a bee by March 1, but I'd be surprised if something doesn't make it. I read in Coy's literature on Russians that they use 20% more resources with a screened bottom board (which my wooden hives have), and the addition of a 1" blue board has no appreciable difference on winter consumption. Just throwing that in as it may help someone since starvation has been mentioned.