So, funny thing. I originally started this thread but never used the motor until the last two weeks (races). I have the newer designed engine case one now. I tried a Werks 2013, had a weird power band with it more mid to top, just felt weak, ran an Alpha 0801 HC and was pretty good, but I then I tried the Werks 2058 and it sang. This thing turned into a rocket. Going to be running it this weekend at the GA RC Pro Series. I will report back how it goes.