Is there a way to shorten the rear a few inches, raise the wheel arch opening, and raise the "bump" so it's highest point is above the center of the wheel arch? it would be more visually pleasing and closer to the original. Sorry if I sound like a critic but maybe it's possible to do this at least for the spyder version. I don't know if it's possible on the z3, I know it's hard to get the nose down because of the radiator support.
Rear view looks dead on and sexy!!!