I fly multi's for a lot of years now. In every footage of the solo i see there is a nasty bounce / vibe in the solo. If you fly it and look at the legs you see them vibrate a lot. That't not good. Even after balancing everything you still see that vibe. So it has to be pids that are inducing the vibes. You can also here all solo's whining / resonating while flying. Did anyone ever experiment with pid tuning?