I had originally had this in the gymkhana area. But now I am just using a regular fiesta chassis. It works. So I had originally a roller and the fiddly bits. But now I found out it is cheaper to get a brushed rally, and then get a brushless system. But first. Can I just buy it and pop in a brushless powerhouse or do I need to change out drivetrain components? And what wheels should I buy for drifting and what wheels should I buy for racing. What about the stockers? Are they good for anything?