Can anyone tell me where BMW's mounting kit for the zūmo installs on the Adventure. A&S Cycle, for example, lists the mounting kit at $59.95 extra in the drop down menu for the BMW z[FONT=Arial, sans-serif]ū[/FONT]mo Navigator but I can't find any details on where this mounts on the bike. There's different pricing for different bikes so I'm guessing they are different mounts. While we're talking zūmo's, how do you like yours? How does it compare to the 276C?