This plane was originally a CSD heavy layup kit, Bill L replaced the wing with a target cut Don Ayers transitioning airfoil 5% thickness, wing was sheeted with 32nd ply, bagged with 8oz cloth, fuse has been reinforced, vertical is razor thin (you can gut a dear with it) and with the transitioning airfoil, it will land at a reasonable speed, plane weighs a feathery 71oz