Thanks for this. I just used both of your DIY's to do the side gills and grills.
Grills (which I did on my e92 335i) are still a bit of a pain in the ass, but the gills were pretty painless with this method.
2016 Yas Marina Blue F82 M4 - In Production
2011 Le Mans Blue E92 M3
2010 Le Mans Blue E92 335i