Just to resurrect this thread...and get it back on topic, I just installed my aero lip following the way the OP did his. I have to say, the thing isn't going anywhere, but it's not as tight as I'd like either. I wish I would have put some tape in the middle bottom, like by the fog lights. That's where it isn't tight. I used the Windex trick, so everything will be tighter once that totally dries, but that won't help the middle. It kinda bugs me, and I might end up taking it off and adding more tape. But that would be a pain in the ass now. Anyone else experience this?
But...I do love the way it looks! I'll post some pics later.
Monaco Blue/Saddle E92 335i
Alpine White/Black F30 328i