I re-did the top brace on my MBX5 desert truck so I won't be using this one. It connects the front/center/rear diffs and makes the chassis a lot stiffer. Also has a spot to mount an ESC - currently sized for the MMM, but can be trimmed to suit.
As you can see in the pics below, there are a few scratches and worn spot where screws were and where it contacted other parts. Can be refinished.
PM if you want it. Free, just pay shipping.