We purchased our car back in 2009. I installed one of the factory 5 Roof scoops and I'm having trouble with the fitment of the rear glass. When looking at the car from the rear, the arc is different that the opening at the front and when looking at the car from the side the arc of the glass does not follow the contour of the roof line. And last the opening towards the rear is too narrow for the glass to fit into the body. What I was wondering is that since the roof scoop is part of the Gen II package, is the rear glass/window different and if it is would it eliminate at least some of our troubles if we just purchased a Gen II window? Thanks