Slight vibration in yaw gimbal- normal?

[Casey Preston]

My X5 has a slight continuous vibration in the yaw axis gimbal at the top. I can feel it at rest and it goes away if I manually push it off the controlled angle. It's slight enough not to show up in footage as far as I can tell. Is this normal, or should all of the motors be vibration free? I don't notice it in the X3.

 

[Casey Preston]

I want to also add that I sometimes get a very loud vibration that comes from the Yaw gimbal, especially when it is first turned on. it's very infrequent. If I give the gimbal a twist, it goes away. Anybody else experienced this? Initially, I thought it might just be a controller idiosyncrasy, but now I'm not sure.