Done. Well, except for sanding and fairing. The new sections consist of two layers of 1708 with additional layers at the edges and corners. Note that while the roof section of this hightop is 4" higher like the factory high top, it is longer than the factory hightop, meaning the front angle is a steeper pitch. My reason for adding a hightop is to provide a place to store 30" x 64" thin flex solar panels, and the ceiling space in a standard factory high top is too short to allow this.

Done. Well, except for sanding and fairing. The new sections consist of two layers of 1708 with additional layers at the edges and corners. Note that while the roof section of this hightop is 4" higher like the factory high top, it is longer than the factory hightop, meaning the front angle is a steeper pitch. My reason for adding a hightop is to provide a place to store 30" x 64" thin flex solar panels, and the ceiling space in a standard factory high top is too short to allow this.