I did my first flights today with AQ 6.6 R19 on my Y6. The first flight wasnt too good. Control response was very sluggish on all axis and engaging ALT hold would cause the multi to drop and then seem to hold altitude before drifting up or down.
After that I checked the forum and started adjusting parameters. I changed the Control Factor Pitch and Roll to .1 and Yaw to .001 hoping to get better control response. I also changed some of the the Navigation Altitude parameters to make ALT hold less dramatic and increased my stick deadband to 80.
Made a second flight and it looked a lot better. Controls were much more responsive without over shooting and transition to ALT hold was very smooth. I put the Y6 into ALT hold and let it hover for a minute or two then I tried flying forward some and started seeing strange motor behavior. The two front, upper motors would slow down and actually stop spinning at various times after flying forward, never at the same time though. Even after releasing the sticks to go back into ALT hold hover the motors would slow significantly or stop intermittently.
The good news is the multi was still controllable with only 5/6 motors running and it maintained altitude. I was able to slowly land each time. Im attaching the motor output plots if anyone can help.