The only thing limiting the size of my enclosures is a lack of blocks. I could always order up some from Home Depot, but I'm far from rich. Does anyone in the Southern CA area have any extra blocks, of any kind, they want hauled away. Or how about friends or relatives in the construction business. Sometimes they have left-overs that they don't want. I'd be happy to pay for them and, of course, come pick them up.