Hello,
you can try to reduce at least Elevator bounce effect if you try this:
Attachment:
Screenshot 2023-06-26 200525.jpg [ 190.94 KiB | Viewed 328 times ]
Of course it is now difficult to see whether you have carried out all the settings correctly, servo horns all right-angled, swashplate in one plane, the setting for the geometry 6° tuning, cyclic ring correctly selected according to the heli etc. Furthermore, the head damping should be new, this can also lead to such effects - All linkages should be smooth, both from the servos to the swashplate and from the swashplate to the blade handles, ultimately this also applies to the rudder, of course, even if it has no connection with the head - maybe can you upload your settings (.4ds), then we can at least check if something is wrong -
Regards