Had my spoiler installed in San Diego on the 27'th. They had a bunch in a stack waiting for scheduled P3D+ owners to show up.
They went through a few before I had one that fit. First one they sat on the trunk to check alignment and were like "Nope, does not fit", so they returned it to the stack. Next one, they sat on bumper between the guides and they liked the fit. Oddly enough, they did not clean the trunk or wipe it with anything. They pulled the tape and attached it, and were like "ok, you're done". I took a quick look and the left side end had already pulled away from the tape with a huge gap... I asked if that was normal and they said "Another one pulled up", someone else said "It already pulled up? that was fast!". so they set about removing the spoiler by yanking on it. Then tossed it in a box with other spent ones. Pulled another new one out of the box and it appears to fit properly. Pulled the tape and seems to fit. So 3'rd times the charm.
Double and triple check before you drive away.