So, I had a couple of little accidents with my newish CP2.
I've replaced all the broken parts and am now trying to tune it so that it's stable.

I ran up the rotors just a little way and one was higher than the other, so I changed the collective arms so that they span in the same arc.
So far so good.

But spinning it up further, closer to take off, it gets a really nasty vibration, and the rotors are not balanced again. The shaking makes the whole heli wobble.

Any advice on balancing it? My experience is limited, so use litte words only please :-)

Cheers, imo.