Interesting post's guys. I hit the dirt this Saturday with my tki4. I built the car all stock with just a different diff combo and shock pistons. I was a bit worried the car would be a handful after reading some remarks in here. I never felt uncomfortable with the car. Track was kind of beat up, a little dust in some spots but good grip in the line. This is a coming from a guy who hasnt touched a car in 6 months and raced in 2 years lol. I will experiment with the old B block and knuckles from the tki3. Just so i know.