ORIGINAL: wflite
Hk600 with a 600mx
I do apoligise, i should have made my question a bit clearer....the reason i asked is your heli IC (internal combustion or nitro as it's known in your part of the world) is that the oil residue from the exhaust can make the tail pitch slider very stiff to move over a period of time. I've got a funny feeling that your heli is electric so thats probably not the issue but i would pop the ball links off anyway to make sure the whole tail pitch mechanism is silky smooth with no tight spots.
Once i was happy with that i would move the ball on the servo arm to a position that would all ow me to run the gyro gain at about 70% without the tail wagging.