This has been bugging me for a few years now. How to tune your quad in Betaflight.
There’s all sorts of settings - P, I, D, d min. d max, i term relax, antigravity, feedforward etc
My 5" quad felt fine on 4s with flysky years ago. Then I upgraded to crossfire and suddenly the bounceback vanished (a wobble after a flip or roll).
Then I went to 6s. Major wobbles. So I tamed down the P and D terms and it was okish.
I now have a source 2 frame with titanium alloy arms and it just never feels right at 1/4 to full throttle. I’m guessing the arms are ringing like a tuning fork that needs filtering out. 
Anyway, this thread is to show how I will try to tune my quad using the blackbox logs.
First off, I did a preliminary tuning flight tonight. And the stats are posted too.
I haven’t got a problem with the setpoint (no high frequency noise) so the rc link is sound. But I have harmonic problems at 150hz, 300hz and 450hz in the motors (they were hot on landing)
All help appreciated 
It definitely isn’t motor related as they all have the same noise…
Although, saying my step response is fine… looks like there is a definite wobble. The motors were hot so the d term was working too hard, so I need to reduce the p/d term I think
