I have. Your 2-axis cars defies the concept of momentum and can also turn all 4 directions on the spot without actually moving. What the hell?
[Update, Baby!]: Got bored so I made a car system which can actually drive in circles and has momentum. 5 minutes and I didn't have to steal code . Up next: drifting, nos and car upgrades . Hmm...perhaps gears for the more racier models....