Flexy Dually : Firmware distance to bed


Using my flexy dually v2, I noticed the wiping phasis included in starting gcode was very close to the interior edge of the wiping pad.
Looking further, I noticed centered prints on cura are printed 3 mm off the bed center (to the right).
I think same positions on single and flexy dually seem to refer to a 3mm different place on the printer

Is there a chance there is a slight difference in bed distance to X end stop definition in the actual flexy dually firmware which causes this offset?

Thanks you for any complementary information,