Fluting the edges of the plates on the fiddle

I actually started building the fiddle some days ago, but wanted to finish the guitars before posting. After having inlayed the purfling I started to work the outside edges of the plates. There are two reasons for that. It looks good and it makes the transformation of the thickness from 4mm at the edges to 2,5 just inside the edges a lot smoother, giving a more open sound. (Thats what they say) If you make a drawing, its obvious.