So, I got my car in December of 2012 Recently Tesla came out with the P85+ and the backup sensors These are retrofits that were not available at the time of delivery. My way of thinking is that if I want to keep it original, as a historical collectors item (first completely built model from a new company, not discounting the Roadster, but that used a Lotus frame), since it was delivered in 2012, the first year of production, not to get those retro fit options Then again, I like those features. I just don't want it to be like modifying a Corvette: Like putting a manual transmission on a 1954 Corvette, you just killed the value or changing the interior, or adding AC on an older model, when the date of production was 1 week prior to when they started putting AC in production cars, making it not original. With Corvettes it's all about matching VINS, timelines, and originality. I could get another bumper, and keep the tires, out I don't know about the other stuff like wiring, and stiffening the bars.