Well, just ran the SCTE with the castle 1415 / MMP combo on a 2S. With a 20T pinion, it may be good on a small track but needs more top end for Meium/bigger tracks. I have the timing set to normal (8*) now so gonna try turning that up and see if I can fit a 22T pinion. Hopefully those 2 will get me more top, cause otherwise, this motor is really good. It has a lot of grunt, able to clear jumps with little run up, and jumps that I could not clear with a 4.5 or 5.5. Temps were nothing on the motor, but the ESC fan did come on, probably as I was running full pin nearly all the way around the track.