I don't know what your problem could be as I am also a newcomer to autogyro flying I have been flying one for only 3 years now My flying partner and I both have Kellets I have been the test pilot for both of them since I got mine flying first. Both of them were stable and will fly hands off for considerable distance. My only thought on the subject is the servo that controls right and left tilt. I couldn't get good performance until I switched to a VERY powerful Digital servo A digital servo has something called holding power This prevents the arm from movement when you are not sending a signal.I am using a Hitec 5735MG This unit has 18 kg of torque and 54 kg of holhing power I also have very heavy pushrods going up to the head and super heavy horns. The power of that spinning rotor is awesome I also use Lexan for the hinge material as it is stiffer than polyproplene which was in the kit. I talking about the hinge for the head not where the blades are attached. The Kellet has the top part of the pylon hinged thats where I use the Lexan. If your blades are not quite balance they could be shaking and the servo is not quite sturdy enough to hold. My Kellet is quite responsive and could probably use some transmitter adjustments (exponential ) but I'm used to it