I'll share my observations once I've run some tests (The IQ only arrived this morning)
Thanks, that would be an interesting comparison.
A little update on on my sharpness, Arca M2 issues for those interested in this lens/camera combo.
I still wasn't happy with the top to bottom sharpness from my lens so I decided to try with a different lens panel. I was using the 15mm recessed and it was a nightmare to adjust the aperture and cock the shutter without looking at the lens. My reason for the recessed panel was due to the symetrical design of the Schneider, the flange to focal distance of 49mm meant very little distance between lens and sensor for movements and my dealer recommended the 15mm panel.
After owning the camera for a couple of weeks I did some measurments and I felt I would just get away using a flat panel so I ordered one. What an improvement. No sharpness problems any more and so much easier to use. And the bonus is there is plenty of space with the ultra wide bellows for plenty of movement. 20mm or more in any direction no problem. Not sure how using with a sliding back would effect things but without its fine. Don't know why the recessed caused these issues. Possibly I mounted the lens wrong or the panel was slightly out somewhere or most possibly user error but I'm getting along much better with the flat lens panel.
Hope this helps someone interested in this combo because these simple things make all the difference and when I was buying the kit I couldn't find any info on the internet about thse types of trivial but inprotant things.