I might use the FK300 (3m electromagnetic release cord) for self-portraits; I have a project in mind which might be part of the documentary project described in another section of the forum.
Being aware of the discussion around structural violence in photography (Sonntag etc), letting subjects make their own portraits might lessen the effect? It is not really new, I know, it somehow reeks of 1980s/1990s commercial advertising photography with the cable and backdrop stand being intentionally visible in the photo.