After washing the Zork PSA in hot soapy water than bombarding it with about half a can of bolt loosener then leaving it to dry for a day this adapter is now working and I am very happy with the results.
One good thing that I didn´t expect is the 55mm Pentax 6x7 Takumar lens I have on the front of the adapter is such a dinosaur that even a bomb going off nearby would probably not throw off the manual focus and it so big that it is easy to grasp for the delicate task of shoving the lens in whichever direction is needed to get the shots I need to stitch.
Shifting the lens changes the amount of light coming on to the sensor but this does not matter much when shooting RAW that makes it easy to adjust the virtual "exposure" of the files in post processing before stitching.
So Rainer it was me that was bent not the adapter!
So far so good