I recently read an interview with Bireli Lagrene where he talks about his picking technique. For electric jazz guitar he rests his hand near or on the bridge and its a flatter wrist. On Gypsy guitars he uses the Gypsy technique as you describe in your book. A higher arched wrist approach. I am wondering why the flat wrist technique can not be used on the Gypsy guitars? Is it a difference in the construction, size of the guitar? Or what? Thanks.