A little commentary on the green wire. First, it isn't oxidation; when copper oxidizes it turns an increasingly dark shade of brown(e.g. an old penny). This results from contact with oxygen in the air; it has nothing to do with the minute amount of oxygen which is added to copper wire during the production process to improve its physical properties, and hype about "oxygen free" wire is meaningless. For example, when I cut some additional lampcord(which I'd bought 17 years ago)recently in connection with changes because of adding the EP500, the copper which had been covered by the jacket was still bright and had no oxidation.
The green color is the result of copper combining with chlorine apparently released from an inadequately stable batch of polyvinyl chloride(PVC)in the jacket. Although it looks unsightly(unless your favorite color is green, maybe), it doesn't affect transmission if the surface in actual contact with the terminals is cleaned.
