Hi Jeffrey
While I am (mightily!) impressed that this can be done. I am **Really** struggling to think of where the feature might be used.
The only possibility that comes to mind is if someone has old broadcast equipment that was used in the early days of colour TV implementation. I seem to remember that NTSC 405 lines were broadcasted experimentally for a time. I believe there was a magazine article on this a while back (405 Alive?).
Chris