This is for Phil Knox and others. Got a side view of the trailer today to show the roof line of the trailer. Yesterday I bought five 3/4 inch 4x8 ft panels of foam board for my boat tail project. I wanted one inch but they did not have any in stock. At only $13 a sheet I figure I can glue waste pieces to the back side of the panels to strengthen the edges and mid points of the panels and end up with a stronger lighter panel.