RE: T-Rex 450sa set up on a Futaba 9C
not something that can be "given" as each setup is different...
Using a pitch gauge....
Set up throttle curves and pitch curves to get the headspeed where you want
I run -4 to +9 degrees in normal mode, with head speed around 2400 rpm
in idle up mode, I have it set to -10 to +10 degrees with headspeed around 3000 rpm