Re: Should I remove a brood box?
How much winter stores varies from one place to another so you'll only know that once you taken them through a winter, but also you could ask some locals. But too much feed is better then not enough!
My own preferance is to reduce the hive to just what is nessecary to house the bees plus the required food stores, where I am that's 2 deeps. Too much room can allow problems such as condensation, harborage for pests, etc. Having said that, some people would dissagree and like to go through winter with a large hive with many boxes, although it's less commonly done.
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).