The "all but three Minnesota counties" claim is not supported by the source @democracydocket.com links to, nor any other I'm aware of. Be careful with advocates, especially those you agree with.
NEW: Experts recommend electronic poll books, a secure method for tracking voter information, for every voting site as they are a "vital tool in election administration." All but three Minnesota counties use them, but one city is suing over unfounded claims the software isn't secure.