Dennis, sharp RT!
You might want to have a look at the newer mini satellite antennae - it would mount up a little cleaner on that GIVI than that old dinosaur you have on it now. More aerodynamic too. (Sorry to sound so critical; just trying to help a bro).
!!! I can't believe it - in the time it took me to type up my response two others beat me to it! Gosh! (The world is full of us smart a$$es.)