Here's one of mine. I built this before the crawler conversion came out. Moved the battery to the front and as low as possible, added a radio tray in back as moved the tranny and link mounts up about 1 inch for more CG. it's cut out of 3/8" acrylic that I had planned to transfer to aluminum, but ended up going another way with the project. It's somewhat funky shaped to fit the body I was using, hence the larger than normal overhangs.
After:
http://i472.photobucket.com/albums/rr84/dschlegel/WKCrawler/z005x.jpg
Chassis shot:
http://i472.photobucket.com/albums/rr84/dschlegel/WKCrawler/z007x.jpg