Noppita
Yes we have the same motor mix. My default PID are the same as yours. When I had a vibration problems I had to lower P to 30 so I could stop oscillations. As soon as I took a roll of tape and quickly connected all the motors by going around the octo arm's ends the vibration problem stopped and I could use Tilt Angle P=60. When I replaced the tape with a much more durable Vectran cord.
Larry