I am thinking about having some tabs welded to my subframe connectors when I have them put on tomorrow. The steel tabs I have are 7 gauge plate. I want to experiment with some bolt in cross braces and see what happens. The cross braces will be removable in case I need access to the exhaust or anything else under the car.

My questions are:

Does anyone have any ideas on this? Would cross bracing make the car even stiffer than the SFCs alone?

Should it just be one cross brace alone (essentially an H brace) or should I place one near the front and one near the rear?

I could use two braces that form an X under the car. This is a little more complicated but is that the way to go?

Let me know your thoughts.
Jon