Thanks for posting that cool brace and Thanks a bunch for your input. It looks like it can provide great lateral strength enhancement. Unfortunately, if I use it, I'll have to use it in both the X and Y axis in order to make the whole idea work and that is something I don't think I have the option to do at this point. Beside, this stand was built by Chris and he have done many large stands of this size with great track record so far. I also have a structural engineer to analyze the stand for it's ability to handle lateral force shift and he did said the center of gravity of th entire system is not tall enough to be critical. He said that there are way lots more structures in my shop that I need to worry about and not this stand in serious event...lol.