i"ve inspected me heli and foud the lower rotor head was broken. i changed it, the heli is way more stable in the air but it still do the same thing!!! ive tried to play with the main motor proportional mix and still the same thing, the thing hover like a charm but still spin on itself. if it is spinning clockwise, i trim the control one click to the left and then the heli start to spin conter-clockwise. i tried to set the gyro gain at different segttings and in can't see any difference. videos can be mad to visualize the problem. thanks for your help