I bought a set of moulds of a Mig 29 in 1992 from a Russian guy who attended the German Jet Masters. The drawings,supposedly masterd from the full size, showed the pivot of the flying stab raked backwards along the mean average chord. This made mass balancing very simple with very little weight needed to balance the tailerons. I flew it for about 8 years and although it was d/f it had a surprising turn of speed. I used Futaba 9303 servos which I believe produce about 7 kg of torque. I never suffered any flutter problems. I have since seen Mig 29s with the pivot point at right angles to the fuselage centre line and I have often wondered how much load is imposed on the servo and the linkage. I don't kow which is correct but I thought I would contribute. Ron.