MAtt, Doc, quit screwing with the stock rack and rail and modifying it. Start over. Meaning, I was looking at a rack on a Hummer today. It's system is the width of the vehicle
and sits quite low. I think you should start with the rails, then the supports, then rack.

Of course it is easy for me to say that since I have no time or money invested in this. Ok, feel free to bash my idea.