Hi - can we place the homasote board on top of the inner cover without an entrance hole (like the one on the inner cover) or should we drill a hole for ventilation? I have heard of making a groove in the board for moisture release - that assumes some kind of hole. My thinking is I don't want to put a hole right over the center of the brood, as is the hole in the inner cover. So if a hole is best, I thought I'd drill it on the side with a groove from the hole to the side of the board. We are buying sheets of homasote board at the lumber yard rather than pay for it from the bee supplier. Any advice from other doityourselfers?