Regarding your cruise control "surging" issue, it's possible that it could be the speedometer cable. If your speedo waggles around a lot, it may very well be the culprit. After I had my cruise control box redone by JamesDean (here on the forums), above 65, the cruise is rock stable. That said, my speedo cable is rock stable at that speed as well. Between 55-60, it will bounce all over the place. As JamesDean told me, the cruise does play off the speedo cable indicator, which can cause the surging issue. This spring I plan on replacing the speedo cable with new...from Pelican!