Hello RickLS,
as the guys above said, there´s a bunch of us that had the same problem...
My solution (I tried to search the thread where we talked about it, but couldn´t find it) was to cut the rubber on the extreme of the drip to let the expanding bushing completely free... sometimes I have a little "loose" sensation on the grip, but it lets it come back freely...
Now, some other guy came up with a better solution, which was, expanding the lenght of the inner parts with a PVC farbicated bushing, so the expanding one goes a little more deeper into the grip tube...
I actually have Napoleon mirrors, which I like better that the OMS mirrors, the give a wider vision and vibrate a lot less...
Good luck!!