Originally Posted by
rcgod
Also be careful doing a no load rpm check. Good way to destroy the motor.
Oh, is that not good? Didn't know that... still a bit new to RC, thanks for the warning!
I'm not completely sure, but don't think the quoted RPM limit applies to sensored-only, as one of the techs I contacted said all Castle's surface ESC have the same RPM limits (and not all support sensored).