I'm in the same exact boat. just this weekend I qual'd second in the A-main and was in the lead when I ripped the stud out of the u-brace (running 3mm shims) 90% of the time I run on indoor track with shaved brace and no washers...this weekend was running a charity outdoor race with no spare u-brace and no hobby shops close by so just ran it, and it bit me.

I have my esc in the back of the battery tray on my sc10b.2 (car in question) and it's a 20 minute job to swap braces (if I have one available) would be nice if there was a way to run both config's on the same brace. I'm real close to pulling the trigger on alum brace with Ti studs....seems like thats the only way to use 1 brace for 2 configs.