I need to know which Sunpak TTL module to look for so I can connect my Sunpak 555 potato masher flash to my 553ELX. I've searched the web and have come up with nothing. I have an 553ELX on the way and would like to take advantage of the TTL feature of the ELX, but need a connector module/cord to do it. Anyone out there know which module I need for the Sunpak to Hasselblad system? I really don't think it's a module, but more like a double cord which would connect the body to the flash and a sync cord to the lens. JohnW