yeah... i liked the video of the uglyest octo i have ever seen
(i'm just joking).
anyway... tried your method and the vibration is still there... but today i've changed props... APC SF 12X3.8 seems to be better (still no balancing at all).
i'm thinking of changing frame... maybe something stronger like quadframe (aka jakub). 21.5mm carbon arms seems to be stiffer to me rather than my 16s.
now i have also a new balancer. a top flite one.. hope to fix this. in the meanwhile... someone can confirm the quality of my inflight log ?