Ok, here is the battery tray brace a little more finished and bolted to the chassis. I added a hard rubber pad that when bolted down gives extra support to the middle portion of the battery tray. Also, the stock center skid bolts on with no problem.
Hard rubber pad on end of brace to support battery tray.
Some updated pictures of my E-Revo battery tray brace. Had to modify it a little to clear the MC2 motor brace and I had to bend the stock center skid to clear the modded brace.