Did you ever find the information you were looking for?
If you did (or do), could you share it here? I'm sure there are many of us interested in the solution.
Actually Really Right Stuff now has an L-grip for the Contax. I purchased one and this will help in doing vertical and horizontal without swinging the head.
They also have a solution for Vertical Panoramics with the use of two panning heads and brackets.
While the above scenerio would probably work, I am not that excited about carrying even more stuff in my bag?
I think I will work on Leveling my tripod (like I did before the pano head)
and then using one bracket and a Pano head to allow for vertical panoshttp://www.reallyrightstuff.com/pano/index.html
something like the above???
or just using the pano head with the ball head turned on its side (with the) after getting it level from that perspective
Thats where I am at this point.