title_body: Tuning with notchy motors on Betaflight I'm having trouble tuning a custom 3-inch build on Betaflight.  I can't get general vibrations to go away.  I'm using RC in Power 1506 4100KV motors on 4S.  These are very notchy motors.  I've been told notchy motors are difficult to tune.  Are there any pointers out there for such a build with notchy motors?  
  
  I've tried several versions of Betaflight 3.5.7 through 4.1.  I've turned down the filtering and the motors stay cool.  I've tweaked the PIDs a lot and it hasn't helped much.  I've even changed to a completely different Frame to get rid of any possible resonance.  I've tried soft mounting the FC, and hard mount.  TIA
upvoted_answer: What frame are you running?  Which propellers?  What craft AUW?
  
  I have very similar setups built as racers, that perform brilliantly on both BF3.5.7 and BF4.1.1.  Even super-notchy 1408 motors on aggressive 3052F props can fly quite cleanly.
  
  In terms of tunes and filters, both are nearly stock tunes and fly well, at most some filter adjustments to compensate for the higher RPM that naturally comes with 3" craft.