We've had a spell of rain here in Northern California. I have migratory and telescoping covers and the standard 4 piece plus bottom boards, some with screens some with-out. Nothing is occupied at the moment. I did a lazy-mans test during this rain. All migratory covers were once painted but now are in need of paint and all leaked into the chambers. Some telescoping covers displayed heavy condensation on the underside. I'm ready to switch to one solid piece of ply wood on both top and bottom. All bottom boards aren't tight in fitting together which of course means air space. What is your preferred hive cover and bottom board?