"
I built 2 types of adapter to integrate all my Hasselblad V and Rollei lens onto the M9. I believe by integrating the optical systems across different platforms to gain insight into optical performance and the M9 is one of the best sensor to do this on."
you don't mention your adapter to integrate contax lenses onto the M9
so I guess that's either because you are still working on it
or this can be done via contax to hassleblad V + hasselblad v to M9 adapter
or with sticky tape
wondering why you consider the M9 to be one of the best sensors to do this on?