Gobsow, you are correct that electrons flow from (-) to (+). I suspect that is the reason for the switch to negative ground, as the principles behind electrolytic rust removal should apply to an electron-rich chassis. However, the distance between theory and practice is sometimes measured in buckets of bondo. :p
I'm curious if there is another benefit in maintaining a potential in the chassis, perhaps battery life is improved? Anyone who didn't fall asleep in Electrical Engineering 101 is welcome to jump in with corrections/clarifications.
