Have you considered welding in another piece of the "repurposed alernate ferrous material" to tie the rear end of both sides together like the Happy Trails setup?
That's ingenius. I stare at everything I see trying to find a rack in it somehow.
Only pic I have of the HT rear bar, but it ties both sides together so they won't bend in a tipover:
That's ingenius. I stare at everything I see trying to find a rack in it somehow.

Only pic I have of the HT rear bar, but it ties both sides together so they won't bend in a tipover:
