I wish to do a center-type mount of a Zumo 660 on my GL1800 instead of a left or right handle bar attachment. I was thinking some type of ram-mount plate at or near the "Goldwing" label location, but not sure how to do this. Any recommendations? I have my XM radio mounted on the left clutch reservoir and a cup holder near the right brake reservoir. The mounting kit that came with the Zumo 660 contains a U-bolt that does not fit the goldwing square handle-bar. Thanks