element 18 in a generally tangential direction as best seen in fig5 fig7 and 9 show an alternative variation on lip 34 the lip 34 can support an aperture 30 or a stake 28 or any combination thereof for connecting with complementary structure on the frame 22 fig5 shows one embodiment of the present invention incorporating a gap 32 between the frame 22 and a panel element 18 including a lip 34 in this variation of the present invention panel element 18 is inserted through gap 32 and preferably is slightly deformed this deformation creates a resiliency force in the direction of arrow 36 and a snap fit between panel element 18 and frame 22 is achieved lip 34 acts to prevent panel element 18 from completely passing through frame 22 the panel element 18 can be formed such that a snap fit with frame 22 is not achieved specifically the panel element will be formed such that its width excluding the lip 34 is equal to or less than the width of gap 32 in such an embodiment the panel element 18 can be secured to the frame 22 through the use of ultrasonic spot welding or adhesive 38 as best seen in the detail of fig1 in another embodiment of the present invention employing a gap 32 the frame 22 can include a stake 28 furthermore in.