Thanks for your fast reply!
I found now your version aswell.
Here's another datasheet I referred to originally: https://www.igo3d.com/mediafiles/Sonstiges/Innofil3D/TDS DE Innofil3D PET CF 180803.pdf
this should be the same, but maybe an older version..
The issues I have with the standard profile settings, without changing anything. In the picture attached you can see the layer inconsistency. It breaks easily away at the transition point of the ring below to the spoke above. The other parts attached shows the same issue going from a thicker profile to thinner spokes.
The support worked well, so this might not be the problem.
The breaking pattern shows that there is a kind of underextrusion, while the shell of the rest of the parts seems to be filled properly.
@SandervG do you have seen such behavior before with this filament?