My drawings are abysmal, I know. (did you see them on the second page?) Let me try to clarify: the lens and frame is one piece attached to the tripod block. The back moves back and forth on the rail on the and is not stressed.
Originally Posted by Ole
Here's a larger sketch. The bottom shows a shadow where the tripod screw goes into the block. http://elearning.winona.edu/jjs/proto/NW13.jpg
The tripod block is at the balance point and can be moved a bit left anyway.
A bag bellows is a good idea. Thanks!
Dunno. Is that more clear or am I still missing something?