The better solution if camera movements are not needed, consider a "Texas Leica" Fujinon GW690. This could be a better overall solution to meeting the focal lenght/120 roll film needs.
If camera movements are needed the better solution could be a GOOD 2x3_6x9 view camera (Arca Swiss or Linhof) instead of pressing a 4x5 camera with a 6x7, 6x9 roll film back.
Bernice
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