Re: clong 2018-2019 Treatment Free Experience
"Any pointers on how to improve the design would be appreciated"
Clong, I would offer this suggestion. Wrap a 3/4" x 3/4" strip around the top and bottom of each box and fill the recess with a piece of 3/4" foam. Cover everything with 1/4" plywood, attaching the plywood to the strips. Handles screwed onto the plywood should be strong enough to lift a super full of honey. This way you can still paint the outside of the hive and not get moisture trapped between the foam and the hive body. Just a thought.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.