I'm getting the flutter from my stock blades (no grips - rigid mount like from the factory) also. I was hoping that it was my grips.
From reading the post from chilei, it's normal. I guess I never noticed it before.

You'd think that I'd recall that from trimming my CH-47. I do that in the back yard where it's grassy so if I fall off the heli I don't get hurt. My neighbors hate that CH-47 in the back yard because of the noise and the mess is makes, but it sure blows the leaves out of the neighborhood. Unfortunately it also blows the water out of the neighbors pools. Har Har Har

So it sounds like you have a story to tell, chilei. What's up with that? And if you are watching the CX forum, are you a new flier?
Curious minds need to know.
And we are always looking for new victims for our Collective.

Soloboss