@GreyArea , is there a way to make the offset part of the PETG material profile?
Actually there is in Orca-slicer but CP6 has a bug and does not include the Filament start G-code section into the print file and therefore this method cannot be used.
There is also another drawback of including it into the filament profile: If you use PETG as support (interface) for PLA (or vice versa) it would not work!
Therefore I created a macro which does it on print start: How to set Z-Offset based on used build plate and filament with simple klipper macro