The point isn't settled on that point because the exact method of Derren's is unknown and I'm sure if anyone could afford to do it that way, Derren could. Both you and I spelled out the disconnect points and perhaps he and his team didn't see that as an important issue. It's magician's thinking. Mine could work without me touching it, not a problem and a very easy to accomplish. Bottom line is the "no touch" feature is just a selling point to magicians who think that addition improves the effect and is something that the audience wouldn't think twice about.