Some thoughts below
Originally Posted by dick
You'll need to add a 10m FW cable, a gennie for a laptop and an assistant to watch the laptop while you're up there focusing (or are you going to have the whole kit with the laptop on the tripod?)
Note that Live View outside can be done with other backs and ND filters
automated focus stacking for focus merge (landscape and macro)
The only camera that has this function is the AFi/ Hy6, unless you're building some kind of a motorised monorail?
painting with flash light, with movements and fast-sync sunlight control
For fast sync you'll need shutters that can do that such as the Rollei e-Shutters (if you can find any) Or to go with an MF body such as H2 or 645DF
What will this contraption give you that a simpler MF kit won't?