I installed a crappy Ebay spoiler to go with my Aeromotions. i got sick of seeing the poor thing collecting dust so I decided to experiment. It required some trimming and admittedly, it was not my best work. However, that's why I bought an Ebay one and not a real NISMO spoiler) Lots of cutting.
Side note, I would love to have a new NISMO. They really fixed the front end of the car. I just can't fathom paying 70K for a Z. I'd rather buy a 380RS and let it sit in Japan until I could import it.