Thanks for the site info Bill.Guess from what I can see the FMA unit operates on both aileron and rudder and is controled to the horizon where the gyros just act to straighten out the plane.I know have seen the FMA unit fly and is very good at flying the plane.Seen hands off landings in a cross wind with no problem.My idea for it is in the flying of twins in case of engine failure etc.Might put it on something else but that would be the purpose in buying it.Twin man seems very knowledgable on the Gyros but don't know if he has used this system?Thanks.Bob Moodie