Yes, we actually chipped ours for Carrera digital. Not an easy thing to do. They are pretty fun to drive but the gears were a little noisy. I just never REALLY sat down to figure them out or maybe I did and they're just noisy. lol Here's a pic of one we are selling on our page. If you want it, let me know. Maybe we can work something out. It is used a little. I don't think there is any wear or broken parts.
Bruce