I like that idea! I'm making mine. this weekend as its long over due. This is what i'm going to do. Tamiya cowboy posted this over on another forum looks easy. I got 2 boards glue and a box of screws for $30. Should be enough to do 2 trailers and maybe 2-3 trucks?. I only have the 1 truck and 2 trailers
Here's the link
http://www.scale4x4rc.org/forums/showthread.php?t=37757