I certainly wouldn't want to add amateur autosteer to my car, or accept the responsibility that comes from hacking my own self-driving car. The big manufacturer

I certainly wouldn't want to add amateur autosteer to my car, or accept the responsibility that comes from hacking my own self-driving car. The big manufacturers will accept liability for their systems -- build your own (or hack a factory system), and you're on your own, personal auto insurance may not even cover you since you weren't driving.