Tricopter tail shaking! Need really help

[claustro]

I had problem with a tricopter with multiwii 2.2
The tail servo is super sensitive and is shaking a lot , the tricopter is almost not flyable .
I tried to change pid without results. Also the front motor make a very strange noise that stop if I take firmly the yaw mechanism , I double checked prop motors ecc, and everything is ok.
The same hardware was ok with a kk board.
Here a video http://www.youtube.com/watch?v=gai0hmmoJ0A

I dont know what to do , if I will not find a solution I'll give up and I'll return to kk

Thank tyou

[tovrin]

This video is private.

[claustro]

Opss sorry , now pubblic

[ddepuy75]

I had that issue running a mini MG servo. I switched to a standard MG servo and that problem went away. I'm running a HiTec HS-645MG.

[NoShoes]

yep, switching servos fixed the problem for me before too. I went to a $15 mg turnigy servo.