Made a few updates. Looks pretty much the same but added in blocks for the front and rear axles. Also bumped the motors up and over to give .25" clearance for belt movement. Also I removed the braces on the outside of the frame to cantilever the wheels and added retaining bolts on the axles.
I'll try to add belts tomorrow so the clearances can be seen better.
http://imgur.com/Xw2xC0l