There was some minor progress on this project:
The camera body has been made out of sheet brass, which is bent to form a rectangle with rounded edges. There is also a tripot mount included:
I will solder a mount for the film hoder at the back and a front plate.
The front plate will take a ring out of aluminium (about 8 mm height) and this ring will hold the focus mount.
The focus mount will be screwed into the ring and front plate with M2 screws. To fit them into the mount, the holes had to be made a bit elliptical with a tilted drill: