thoughts about the rose

Time has come to think about the size and shape of the rose.
One of the designs that I like is that of the Chambure vihuela.
(Photo from www.vihuelademano.com, gif-image from the website of  Oliver Wadsworth)

Unlike the original on the left picture mine will definetely not be of 3 layers of parchment reinforced woood but 'simply' one layer of pearwood (black in the drawing) with one layer of parchment (red in the drawing)