Great work (as always with Chiek)...
I've also started a project as to replace my Fuji GX-680 system with another with (more and far more accurate geared controlled) movements. The project's task is to use Contax 645 lenses on a view camera with both MFDBs and mirrorless cameras as well as to retain multishot "true colour" capability with the MFDBs.
My (highly modified) Rollei X-act 2 will have full communication interface between C645 backs (on the rear standard) and C645 lenses (on the front standard),
-will do multishot,
-will focus all C645 lenses to infinity,
-will rotate the rear standard by 90degs,
-will have a focal plane shutter with speeds up to 1/4000 & flash sync up to 1/125sec,
-will have exremely bright optical finder with microprism shimmed to absolute zero for both sensor & film, but LV with MFDB & mirrorless too,
-will take a FF mirrorless on the same rear standard, there will be no "one shot" cable needed for P1 backs,
-will allow shooting with a C645 film back retaining the back's automatic rewind of film,
-will have a 42x31.5mm framing area extremely accurately marked for the backs, so that all C645 lenses will be able to be used with full movements,
-will provide full EXIF data to be stored.
The project's stages will be photographed and presented here with full description... At the moment, we (me, my technician and my machinist - all good friends) finished collecting the equipment needed (a Contax 645 body with busted AF, a "naked" Rollei xAct 2 body, a C645 film back with no insert and a Hartblei screen with microprism) and finished the design of the parts that need to be machined as well as the ergonomics design of the final set up...
So, if one wants to discuss anything on the project and the solutions that have been found, don't hesitate to ask as the project will be easily adaptable to nearly ALL View cameras with the same process...
EDIT: After the project will be finished (about four months time) there will be adapters designed that will enable to use even wider circle lenses on the (very wide) Contax mount of the front standard...