Hi All to kick things off i have found with my Jet Legends F15[over 50 flights] that the rudders are of no use whats so ever,when used in knife edge they just throw the model back to upright,the only time they might be of use is on take off in cross wind to keep the tracking straight,i think that to fit servos to rudders is a waste of time and money ,other F15 pilots i have taked to about this are of the same opinon, any comments regards KeithW