Question guys: The area where the front diffuser covers the top of the bumper lip: My bodyshop secured it with 4 rivet type things and 2 of them popped out already! I dont even know if these are the ones that came with the bumper or if they came with any at all... Theres only 2 holding them now, how did you guys secure yours?? I'm going back this friday to have them look at it...