basiccamaro

Can you adjust the rear "trunk lid" panel on the hatchback glass by loosening screws and moving it around or shimming it up on the glass or anything? The panel on my non- spoiler car sits a little too low in the front. The back edge isn't as bad height- wise, but it isn't perfectly positioned fore and aft either. Side to side it's OK. My glass lid doesn't leak and opens and closes well and I don't want to mess with the hinges and mounting screws.

I've got the three spoiler pieces that I want to put on the car, but I'd like to get things lined up better before I start drilling the mounting holes for the spoiler pieces.
I've seen other Camaros where the fit was a lot worse than on mine and it really makes the spoiler look bad when the pieces don't line up correctly.

Is there anything that can be done?