I watched some guys racing one day and afterwards bought a HPI RS4. I entered the following week and got my butt handed to me. Of course I knew nothing of set ups, tires, gearing...nothing. They all made it look so easy and yet I couldn't keep my car off the boards or off its top. Most everyone else was running TC3s, so I assumed it must be the belt drive car
I sold it and bought a TC3, then a week later, a FT TC3.
Knowing what I know now, I wish I would have hung on to the RS4. Though I loved everything about my TC3s and actually still miss running them today, I know now that the RS4 was a good chassis and it would have been fun getting it going.