I bought one, and I started having problems with it getting tuned in my RC8b. It became really frustrating. It would idle great, it would run like an animal. But it would not hold a tune. Then it finally got to the point where it would go about 100' and just die under full throttle. I got so pissed. I called AE, and come to find out, my tank is crap. They have a new batch of tanks they are sending out. But all in all, the reedy ran with the 5 and 7 ports at the track, no one could run me down. I love the motor.