Nothing else to do but play around. How about this for a extra rigid corner weights stand? It's totally capable of being disassembled into about six major pieces plus accessories like nuts and bolts and washers and braces. This allows it to be boxed and shipped anywhere.
Corner leveling adjuster for the weight stand. The tube gets welded to the weight frame and you adjust the height by turning the Alan screw in the middle. Each frame would have 4 of these. The real beauty of this weight frame is that it can be totally disassembled for shipping.
