I dont have EPA, and by the weakest torque possible, I mean that the rod is in the fartheset up hole in the control horn, and the farthest up hole in the servo arm (I know that the farthest up hole in the arm isnt good, but since the servo is set inside the wing for water protection, theres no way around that one). Also, after testing the stabilizer's I also get buzz in both of those, the vertical only when the servo moves off center, and the horizontal nearly all the time. I read elsewhere that buzz in big planes is normal, and this plane is a 7-8 pounder. The aileron has about 3/4 travel, what the manual calls for. Keep in mind that it only buzz's when its at full deflection in either direction.