ill actually help get some thin plastic like they use on hot wheels packages but big enoug to cover the bottom of your car then cut it to the size and shape you need and use some screws that are already in your chassis to hold it on. i only made mine big enough to cover the bottom of the main chassis and the battery holders. i used the front body mount screws and the ones in the center ofthe chassis on either side of the power switch to hold it. realy need one of these if you painted your chassis like i did
Hey, could I take a closer look at those skid marks? 
