It seems you already know about the brakes, however there seems to be one more problem as well...if you hit any bump too hard, the tires pop too easily. No clue if this was intentional or not, but even though it doesn't impair ability to jump the vehicle like I've been trying to do when I discovered that even some normal bumps can do it, but it's kind of annoying. Otherwise, wow. This vehicle has been made very well...only thing I'd suggest adding cosmetically is some suspension model of some kind that looks the part, though this is optional. --- Post updated --- Another problem I'm finding too related to the ignition thing...it seems that the starter is too weak to start the engine unless you drag the vehicle forward some, throw it in drive and keep holding the starter key until it somehow catches.