Hi all, I know this will have been asked many times. I have looked through old posts but cannot find the information i am looking for. Hope someone can offer some advice?

I have a Trex 450. It is upgraded with carbon frames, carbon blades ect. I am using a gy401 gyro with a hds877 digital servo. I have it all set-up and it hovers fine, but i have really bad tail wag. I have gone over my setup twice now and still cannot get it sorted.

I have set the gyro up on the standard setting and used both high and very little gain there is no diffrence in the wag. The head speed is at 2,200 on the hover. If i disconnect the servo linkage the servo does not move, so i would say vibration was not the problem. The linkage is free from slop and does not bind. Any ideas?

Regards

Paul

P.S. I bought the heli secondhand so have not used it yet.