Thanks, Harry. What you describe seems to be exactly what I am experiencing. The plane really doesnt have a rolling issue, just a yaw instability. Like I said, without radio input, the plane flies straight and level, it just fishtails. The wings dip cyclically but correct themselves in level flight. I think I'm going to try just a rudder gyro first. Dave, I will look into the ACT Gyro. Who sells these? Im not one to judge things too much on their cost, but I feel weird installing an inexpensive gyro in a jet. Thanks for the help guys.