I have 2 TC3's...one has extensive mods and the other is basically stock (has the battery mod only). The modified one handles great. I've had great results with it, but then I pick up the stock TC3 and turn laps just as good or better with it. I've spent a lot of money on both cars trying new third party parts and chassis' and known seemed to make the car faster. To add insult, I built a racer kit for my friend and his car handled as well as mine first time out. It took me six laps to shake him. I feel now that the car really only needs the battery mod. All the after market parts are just to make the car pretty.