The Fuji GX617: If you take the back off and compose/focus an image using the ground-glass screen, is the image you see on the ground-glass screen upside down? I am assuming the answer must be yes (but assumptions can be wrong, hence checking). I am after moving up from an xpan, but am frustrated with the parallax effect of being a rangefinder - not getting 100% viewfinder-to-plate match. I am assuming the ground-glass in a GX617 gives 100%match, but rotated through 180degrees - is that right?

(I know the GX617 also has above-mountable viewfinders, like the XPAN 30mm lens finder. As an aside, how do these compare to the XPAN finders for coverage?)

Many thanks in advance for all advice.
Dylan Reisenberger