Is there no way to fit the large Sony 55x41mm sensor inside the Fuji G-mount?

As you well know the new Fuji G-mount has a 65mm diameter. I was wondering if that mount could actually fit the larger Sony 53x41mm sensor used by Phase One. But that sensor has a 67,5mm diameter (On the image on top see the blue rectangle area on the right). So it’ doesn’t look like Fuji could use this kind of sensors on their future GFX camera. Unless I am missing something  and maybe cutting 2mm has no effect?

So the question for you folks is: Do you know for sure the large 55x41mm sensor will NOT fit on a G-mount camera?

P.S.: The GFX is back in Stock at Amazon US.