My father has always had altimeters in his cars. He was in the USAAF in WW II and I think part of it was just being a fan of aircraft instrumentation. He passed down a car to me many years ago that still had the altimeter in it and I've moved it from cars ever since. The thing is 50 years old now. I ordered my Model S last week and was thinking about an altimeter. It may be time to retire the 1960s vintage unit and get a new one. I was looking around and there are small altimeters being sold to model rocket and drone flyers. Having done a fair bit of embedded firmware, it got me thinking of an altimeter ap for the Tesla. I know the center console runs on Linux, but I would have to interface the altimeter hardware in there some how and then write an ap for the console. With full access to the OS and the buses connected to the console it probably wouldn't be tough, but I think it might be tough to hack this one. There are a lot of people here with a lot more knowledge of Tesla's systems than I have and I was wondering if such a thing was even feasible with what is known among the Tesla enthusiasts today?