Eric
Don't use save config. You have to manually update the new offset in overrides
However with autoz you should be adjusting switch offset. Nothing else.
It's all managed appropriately depending on the configuration selected
Why not swap preheat and heating? Meshing at 150 is fine and then it doesn't need to drop.
I've not seen a Need to purge with klippain since it does retractions at the end of a print, personally
I think all that is a lot of work and new code vs someone taking 3 values that rarely change and updating things manually Would you also have to mimic...
Why does it have to be in printer.cfg? If frix is writing it it can update overrides and everyone wins
Also most people have zero clue how save config works or where it's saved to.
it would update the appropriate position_endstop or z_offset
Perhaps the user variables that klippain sets on files being included would point the way