Beacon Y-Offset out of bounds

I just got my Beacon working despite some problems,
but when I try do do a bed besh, he always complains about an Out-Of-Bounds move in the front.
This is correct, since the Y-Offset would need him to go below the minimum Y=0.
How can I tell him to ignore the first few cm of the bed during meshing?
Funny thing is I am using the stock ratOS y-offset for the beacon which is pretty close to the real offset.

printer.cfg20.15KB