First of all thanks for all the replies. Second I had a question about how to maximize sites beyond four as I'm trying a micro breeding program. I like the idea that if said plant turns out as a weak plant I can easily swap units and discard the cube.My dilemma is 4 units at a time really makes the art of selection difficult. This cabinet would be for veg only with a separate larger area for flower. So would like to learn more as far as ways to maximize sites.