I'm having some items repaired on my Roadster, and I've run into some parts supply issues. I'm trying to determine the history behind the various door sills used in production. Does anyone know if the different versions were used at different times, or if they were specific options? As far as I know, these are the four versions available: 1. Plain black plastic 2. Black plastic with silver scuff plate 3. Carbon fiber with silver scuff plate 4. Carbon fiber with black scuff plate Was the scuff plate added with the 2.0 or 2.5 redesign, or was it a production change at a random point in the production timeline? Are there any versions I didn't list?