I have a used spoiler I would like to install on my S70. How critical is the gasket/tape that is applied to the spoiler? This tape doesn't hold the spoiler on, does it? Am I right to assume is it just there to reduce vibration? Would I be fine using 3M double sided foam tape or must I use the dealer stuff? I'm assuming the clips/screws are what really hold it on, but I don't want it flying off if I use the wrong tape. I work when the dealer is open so that option is inconvenient.