There are many systems for Reflexor.  My control for it takes more pressure than I'd expect a servo to handle.  I also don't see it as a good elevator control.  For instance, in flight I like to reflex the ailerons full up.  This makes you have to go forward on the elevator.  Now you've reduced the lift on both wings.  I go 4 mph faster due to this.  Yes, I have to use the elevator trim to remove the need for forward pressure on the stick but that's a very small price to pay for extra speed.