Thanks everyone. It turned out much better than I thought it was going to also. My husband is a computer guy so I was quite pleased with the results. About the gap at the top, I just worried that they might not get enough air. The humidity is so far at 51% which I know is a little low. Still working on seeing how much water is needed in the bowls for the desired percentage. Still tweaking. I have one in shed so I am misting in there until I get it worked out.