I have learned two things - first, the neck strap for a GX680I or GX680II is different than the strap for a GX680III. It has a metal bracket that will not fit on a GX680III because the knobs are slightly different on the camera body, and its base needs to attach to a Horseman quick release clamp. Second, S K Grimes makes a handle bracket for the GX680III, which is what I am really looking for, some way to handle the camera on and off the tripod, not necessarily shooting it handheld. So, I think I will be ordering the Grimes handle.