Re: Covers and condensation. Is this right?
the pink foam doesn't absorb moisture, so no, covering the hole won't matter.
the foam will keep the 'ceiling' in the hive from getting cold enough to get condensation on it, which is good because you don't want that condensation there dripping on the bees and killing them. excess moisture will exit your notch.
i was told to put duct tape on the foam, so that the bees wouldn't chew the foam through the hole in the inner cover. i didn't get around to it, and i never saw any pink crumbs being removed from the hive. it turned out that my bees didn't chew the foam, but it sure wouldn't hurt to cover the foam in that one spot.
you are doing pretty much what i do, except i put notches in the front and back of the inner cover, and screen them to keep moths and beetles out. the bees use propilis to close and open the screens as they see fit.
ps: i decided to fit the foam inside the frame on the top of the inner cover instead, and the top cover rests on the foam.
disclaimer: novice beekeeper here who knows just enough to be dangerous