I know this has been a topic on here before, but I'm going to ask anyway. I ran across some EXT sail panels, box covers and tailgate spoiler. It DOES NOT have the 3rd brake light panel with it. Question is, will the sail panels fit correctly with the avalanche 3rd brake light? I'm wanting to pick these up Saturday and put them on this weekend, but I thought I'd ask you guys before I made a $600 mistake.