Part of the Cars 2 mega marketing machine are a set of 4 1/32 size pull back and go toys of McQueen, Bernoulli, McMissile, and Mater. McMissile was cool, and looked to be the easiest to convert, so I picked it up. I was going to try and put a motor and gear on the original chassis but that looked too hard for me to do. I dug through all my cars and found that the Audi TT was the best match for wheel base on this toy. Quite a bit of plastic surgery later and the Audi chassis fit well under the McMissile body. Using some epoxy putty, I made new screw mounts for the chassis and put it together. Here's a video showing it running. It's a digital car, and so can change lanes on my SSD track. There was plenty of room for the chip in its original location, so I didn't have to mod that at all. I'll try to get some pictures of the chassis and body later, once I get a better mount for the front, which I had to remove the original screw mounts from the chassis.