Should the car seats be stitched into the foam at any point, or should it just just be a single unbroken piece of material going across for each color? If it should be stitched, about how wide apart should the rolls be? Should there be piping at the seams, or should it just be stitched together? What I got with my car wasn't original, so I can't go by it. I'd like to look the way it was delivered. Also, if you know how far apart the headliner sections are stitched, that would b a big help, too. Thanks.