Hi Wim,
I know this is late but I just saw this thread today.
According to the service manual:
- cock the shutter (not absolutely necessary but recommended)
- use a piece of rubber sheet (I imagine they mean something like thick neoprene) to grip and unscrew the shutter release assembly (button, surround and something that looks like either a small washer or an o-ring in the diagram)
- remove the advance lever, stopper (like a washer with a long tab) and shutter shaft (looks like a small pin)
- remove the 4 screws (front, back, each side)
- de-solder the wires from the hot-shoe contacts
Done!
HTH,
Scott