For damage like that. i would clean and sand the wingtip and go with some shaped balsa or light ply and tack in place with thick CA , then reglass the wingtip, sand again fill any gaps with bondo and repaint. There, nothing to it. I currently have the DV8R in my workroom but i think i can make some more space... hey airbus send it to me! I charge a flat rate and for materials used.