RE: Vibration
I too have noticed that the arms are different lengths using both 4deg grips... The heli is flying pretty good, except it shakes below hover speed. Didn't think this would be a prob, except it happens during decent, especially if there's a wind! Then the gyro starts tweaking out...
Upon close observation, right as it starts shaking, the blades are out of track. I set them up for hover speed, but now it looks like a compromise is in order. The hub and feather plate are new. I do use a DIY blade holder cut from styro as well.
Any thoughts?