Not for the squeamish
I forgot to mention in my original post that I've owned the car from new, and it already had sports suspension, sports seats, anthracite headlining, 18" blade alloys, Xenons and adaptive headlights, park distance control front and rear, reversing assist camera, model designation deletion, chrome line exterior (that can be specified with the M Sport), panoramic glass sunroof, and the list goes on. The M sport aerodynamic bodystyling package was the missing option. I had investigated the ACS body modification options but much prefer the look of the BMW M sport aero pack so..........
Next...........perhaps a BMW or ACS power upgrade?