I have noticed that sometimes on the four link brackets there is a cross tube welded from left to right. Is there a lot of flex going on and at what point is it necessary? I have never heard of the brackets flexing or bending, but I guess it's possible. My brackets are 1/4" thick from Smith Racecraft. They are four link brackets, but will be using ladder bars. Car is a big tire four speed setup. Should I be thinking about this mod? Car is going into the 8's.