I've read informative posts regarding flash photography and Hasselblad. I have a 203 FE with PM45 (flash shoe in top). My lens is 80mm FE (no shutter in lens, this 'blad has a focal plane shutter). I'm new to MF, Hasselblad, have not even loaded the camera with film, but I have some. I'm looking at the Metz 45, I see various version online. I also want to use the TTL sensor, and I will need the 2 sync cables (PC and multi-pin, both on body, no PC on lens)? I assume that makes the flash go boom. Does the Metz have all I need or do I need a Hasselblad or Metz accessory? If I want to use and old Vivitar or new Nikon flash with the PM45 shoe, do I need a "commander" with 2 cables between the flash and shoe to connect to the body (PC and multi cable)? I read the manual. It focuses on Hasselblad equipment.