Now, what about that gap between the roof and the headliner rails (or what ever you call that part just under the roof). I filled mine in with a puffy kind of linear trim pillow. I sewed pillow stuffing into a double tube arrangement shown below. One tube goes behind the rail to hold the affair in place. I'll try to shoot a photo of the result. It looks nice. Coincidently, the violet fabric I chose goes well with the gray carpet.