I got a brilliant 2006 R8 a few weeks ago and all was luvy-duvy except the neck wasn't all that comfortable to play on. The thickness (front to back) wasn't a problem, but the width of the fretboard was. It was uncomfortable doing wide vibratos (with BB King hand fluttering) and full barre chords felt odd. You can see below how much the index finger rests/pushes against the lower edge of the fretboard/binding.
So I got some sandpaper (gasp!) and took off some of the binding. Viola, I'm in the groove. The difference in feel is amazing. Everthing is easier to do and there's an illusion in my hands that the neck is even thinner front to back (impossible I know).
Here is an exaggeration of the fretboard before and after:
I started with a sharp angle that only cut into the top half of the binding and took away as much as I felt I could. Then I went back and evened the binding up so that the bottom half was smooth with the neck wood. Careful going and many stops along the way ensured that I didnt' sand into the neck itself.
-