I love the look of BMW aero skirts on the Z4MC and am about to order a set. Lots of people on this forum have them and their cars look great. But before I pull the trigger, I want to ask the group if there are any negative issues I need to consider. Are they difficult to install? Do they integrate with the car as seamlessly as the standard OEM panels? Are any irreversible modifications required in the installation? Once installed, are there any problems or unintended consequences? Thanks in advance for your replies!