I just bought and chipped two of these for my Carrera Digital track last month. Fairly easy to add a chip..I just had to Dremel away a bit of the steering column. Even added an old light bar I had laying around that seemed to be a good fit. Still need to hide wires a bit better, but we just had to race em quick! :D Also, had to play with mag vs no-mag as they didn't do any change in elevation very well, but do now.
If anyone finds anything out about tires, drop me a line..would love to try different\better than stock. I think that's the traction problem I'm still having. Thanks!!!
![Image](http://media.fotki.com/1_p,rtdfwtbsbrffdqqxsrkgsrrdwtwf,vi/ssfqsqssrxbrwbqgtbbxtfbqggwtd/9/420369/12639488/20170313_232924-vi.jpg)