I had some time this weekend to do some work. I picked up some aluminum to start structuring out the center leg attachments. This will be bracked to the bottom plate using 1/8" thick angle bar stock. I machined out the holes needed to attach the brace to the frame and leg and got it bolted to the leg. It's a nice tight fit and the braces are not coming loose at all. The top is very level where it will attach to the bottom plate.