Greg, can we get a look at the raw from the 120? I was asking my dealer about using that lens with my RM3di. He said an adapter is available, but the lenses have zero usable image circle beyond the IQ4 sensor. I guess "usable" is a matter of personal taste. For example, I dislike shifting much more than about 12 mm with any of the older Rodies (eg my 40HR) though, of course, they will go further. So what I want to get a feel for is how the 10 mm shift quality compares between the 120 LS and the 120 apo sironar. The 120 apo has all sorts of aberrations when you get to the edges but, at 10 mm, an edge/center comparison is pretty good.
It seems that outer circle consistency may be one of the advances on the float Rodenstocks. From images I have seen (thanks @Dave
Chew) they stay clean - even to the edge of the specified circle. Not used to that with the older lenses.