Herb, I will enlarge the holes a bit. Since the top is pegboard the counter sink idea won't work. Had I built something like your impressive box, with a thicker top, I'd do that. Thanks for the suggestion.Barry, you might try enlarging some or all of your holes. The small holes actually cut down on the sir flow. Also they recommend beveling both sides of the holes to increase air flow. You can do that by just using a countersink.