overlay skins 38 to the panel system 8 is by using a double tabbed overlay holder 42 the double tabbed overlay holder 42 operates similarly to the overlay holder 36 differing by a second tab 39 extending in one or both perpendicular directions parallel to the first tab 39 from a point nearing one or both ends of the elongated surface 37 fig3 33 depict four embodiments of the double tabbed overlay holder 42 the double tabbed overlay holder 42 allows for the attachment of the overlay skin 38 to the frames 10 while providing a small gap between the overlay skin 38 and the exterior wall 20 of the peripheral member 12 the small gap can be filled with an additional velcro type fastener a third method for attaching the overlay skins 38 to the panel system 8 is by using velcro 48 or similar type fastener between the overlay skin 38 and the frames 10 the peripheral members 12 and the corner peripheral members 46 fig3 illustrates the attachment of the overlay skins 38 to the system 8 exclusively by velcro type fasteners 48 alternatively fig3 could additionally include a double tabbed overlay holder 42 between any or all of the adjoining pairs of peripheral members 12 a fourth method for attaching the overlay skins 38 to the panel system 8 is by using the overlay holder 36 or the double tabbed overlay holder 42 in conjunction with corner holders 43 44 an inside corner holder 43 and an outside corner holder 44 each serve 90 u00b0 corners and can be screwed welded or adhered with.