I'm Working on restoring an old bass, top has serious arching deformation, do to poorly repaired cracks in the past. Working on filing one spot where the original wood is missing in the lower bought and wondering if anyone had any thoughts, thinking of just doing a belly patch which feathers down to the edge. Link to a couple of pictures. http://s1060.photobucket.com/user/Mr-bubbles/media/IMAG0158_zpse4083104.jpg.html?filters[user]=143348490&filters[recent]=1&sort=1&o=0