I installed a strongbox-231 doubler in my XJ and am looking at fabing new crossmembers. What is the school of though on mounts. Do people have luck sticking with the just the stock tranny mount? add a 2nd off the doubler, or just run one of the doubler and ditch the tranny mount? I am concerned about the 2 mounts not flexing the same leading to breakage. Any proven setups?