My top boxes look great - I now have 5 boxes on each hive and they are filling the 4th box, the bottom boxes don't have windows though.
What a great nectar flow - I was not planning on harvesting honey this year, but I may have to take the top boxes in order to get the hives down to a reasonable size for winter.
Here are videos of each box:
July 2 2018 - we returned from a week away horse camping in Roosevelt Nat'l Park to find Hive B's roof/quilt box on the ground! Must have been windy here. The top cloth was pulled back 1-3" on the SW corner and some bees were going in and out of the top box. Thankfully, it was plenty warm and the queen must not have left. I put the quilt box and roof back on!
July 4 - Mark helped me lift FOUR boxes on each hive as we added a box to the bottom of each hive because they were filling the bottom boxes. Hopefully, we did it in time and she won't swarm with half of her hive.