I have one in my X1-CRT and I love it. Holds a tune very well, likes to run around the 220 degree area, and is a screamer in my truggy. I am running the racers edge #7 glow plug and Werks 30% fuel. With a Fioroni Turbo sliding clutch on it, I find the bottom end to be exellent. As for run time, I usually pit around the 7.5 minute mark just to be safe. All in all, a great budget motor with enough power to keep you competative, and it is easy to work on. Hope that this helps.