NEJE 3 MAX V2 E40 Problems with the laser head

Is it normal that other neje e40 air assist adapters of the same model are above the edge of the module and mine is 7mm below the edge of the module. Attached is a comparison picture

This is normal, this is the latest version

So what would be the right height to set? since it can’t be 5mm from the laser’s body to workpiece as mentioned in the manual (5mm being shorter than the 7mm protrusion in the diagram)