Should i make it the smallest possible? with the entrance reducer? which is about an inch? and is that good for them for the winter?
I Live in Finland and we are waiting just now first snow storm.
I keep at winter 4 inch wide entrance and at end of reducer there are narrow gaps 5 mm wide for water. And the finger size middle entrance is essential
. It middle entrance is not open bees will get nosema.
Wide opening is importart because died bees will close the opening.
Bottom must slant forward so condensation water rund away from bottomboard.