I know it is not an offered option, but if you could - would you? I am original Signature Model S owner and would never part with my little part of history, but have to admit that I'm a little envious of the new features. Plus, until 7.1 comes out, I will likely have a big reminder that I don't have AutoPilot on my dash as I watch static picture of the car with no sensors... Would you pay 10k for a sensor retrofit? 15? 20? Just curious.