Thanks for getting back, just saw your response. I have been in contact with ADDCO and they are making a new “anchor plate” (their term) for the bar to a simple modification I gave them-essentially extend the bottom end of the plate by 2″ so it bridges the entire bottom of the arm. Once I get them I may grind or cut them to fit the contour of the arm nicely. Also planning on boxing the arm and either putting spacers in for the vertical bolts which I will locate and drill in the plate myself or welding the plates to the arm.
What do you think about the 1″ bar thickness with a 13/16 front bar??