Serge,
Just a guess, but your light leak looks very similar to one that just recently popped up in a second (don't ask), older, 6060 back that I have. One with the red release buttons, too. I spoke to Dave about it and he suggested it was coming from the dark slide mechanism, specifically the slots in the back that the bar moves along. I believe he thought the fix would be simple as he said the light seal uses shutter curtain material that would be easily obtained, no need to get parts from Germany. Give him a shout and see if he can check out that part of your film back. Best of luck and let me know it it works out, I need to send my back to him for that repair. Meanwhile, I have put a strip of gaffer's tape on the back and I hope it's working, I haven't processed anything since I discovered the problem, although I keep shooting with the camera. Despite all the setbacks I have had with it, I just love it. BTW, as far as I know the spacing problems were caused by the film inserts, not the back. And I heard that Rolf is doing the Hy6 repair work for Paepke, probably why you haven't had any response from them.
I am still willing to send my newer (grey buttons) back to Dave if it is still needed.
