Just thinking loudly - is there a 6x12 camera that would allow for tilt movements? I know some 6x12 offer shift, but for landscape work the tilt would be more useful in my opinion. A few degrees would do the job for most shots.
I know - one can always attach a 6x12 back to 4x5 camera - but that means attaching heavy back to camera that is not too light to begin with. In my case (Tachihara 4x5 - no Graflock back - that would mean to use something like Sinar ZOOM back. I have never used one though).
What would be your thoughts?