I don't have that kind of B.S. degree.. lol

As far as option parts... The car doesn't need any. It comes really loaded up. I would strongly consider some springs that VPProUSA sells. It just depends on what you're looking for. There are many options for the car for weight/performance. However, the car is good stock.

Spare parts.. pretty typical. The front A-arms are soft which give it traction and stability but tend to warp after some time. They don't break as far as I know. The hinge pins were too hard on my version. I believe Gene is working or has worked with them to get softer ones. The older shock shafts were too soft and can bend with hard impact on the rear. Again, this problem has been looked into as well. The car is pretty durable and very capable stock.