Today I got the rear cockpit floor panel cut out. The grid system that I'm making for this panel is made of 3/8" ply and has 2 for/aft stringers, and 2 sideways stringers. This matrix of stringers is the biggest grid so far. It's a lot of fun making these grids. They are so slick the way the notches lock together. And when they are all filleted and taped, the panels seem very strong, stiff, and light. The last picture is of the panel with the grid filleted and weighted down on the floor (to ensure a flat cockpit floor).