No real need for drilling if a good silicone is used.

Just sand both spoiler and trunk nicely or let some professional install it.

that's what my body shop did.

Use the transfer technique. Use small zip ties. Secure the zip tie to the spoiler's mounting hole using a small amount of masking tape where tab end lands at the center of the hole. Repeat this process to the holes you want to use to bolt the spoiler. 4 is enough. Set your spoiler on the hatch checking for eveness and if centered. Better to have help holding the spoiler down. Transfer the zip ties onto the hatch by firmly holding the tie and taping it onto the hatch. Lift your spoiler off slowly. Get a sharpie to mark where the tab lands and that's your drill mark for your spoiler holes. Hope this helps.

If the bottom plastic piece on the inside of the hatch comes off,it should expose the metal on the inside?

Thanks fellas I really appreciate feedback.dont really wanna go to shop unless I need to cause I like to learn how to do these things.

:tup: Took me a while to picture the process but I finally gets it. Brilliant idea Rafael!

Kind of like my fluid idea, but way easier.

I want this so bad!