Complete rear seat done. Bought two precut lengths of 15 series extrusion for the front hinge rails(20” and 32”) and utilized the old rail off the 40% section along with a matching piece left over on the garage for the package tray (20” each). A reject poplar glue panel from work makes the base (20”x28 5/8”). Tray mounts to the rear seat rotating hinges so lower storage bins are easily accessible. All in all less the $70 for this set up, not counting the Rigid boxes that we have had for a couple of years. Pretty pleased with how it turned out