Progress: Some pleasures, little progress
Progress has been slow lately. Unfortunately I have not had much time to work on the project.
The greatest joy is that I have found a way to fit Raspbery Pi inside the camera body without having to cut away large sections of metal. In addition, I disassembled a power bank and made room for battery and charger / mains power supply to the Raspberry Pi.
The next challenge is to develop a mechanical shutter that could trigger image capture.
The biggest challenge is getting time to work on the project.