Unfortunately I see that Venus in this drawing is already thinner (more "modelesque" by today's standards) than the one in the painting, even before she has had her cosmetic surgery done. I think it would have made a better statement to keep her proportions the same as the painting (chubbier and without the very small waist) behind the lines denoting slimming her down, so the contrast between what once represented the "ideal" beauty vs. today is more highlighted.