Yah the parts for the Pro4 arent that bad i have alot of spares. The Avid is really nice smooth but having some problems with the spool chattering alot in the mid-shaft area but otherwise the car is good. The one thing that i like is that it comes with all the hopups already dont really need to by all the extra parts for it. Havent really taken it out to the track yet just been messing around with it with some guys that go to the local Best Buy in my area. Hopefully soon i can start taking it to the track soooooon.