The proprietary technology incorporated into the new GS Mk II power cords is now available in the HE Mk II power cords. After 6 months of development for the GS Mk II version, the unfortunately named 'Whizbang' technology has been implemented as a single version in the H.E. power cord. Same (introductory) price as the oringinal HE power cord, but a substantial upgrade.
And those of you who have the original H.E. power cords, you've not been forgotten. A complete rebuild to Mk II specifications is available for $149 for the time being.