I have just placed an order for Ben Duncans' 'Black Book Vol 1' which claims to prove cable directionality. It cost me fifteen pounds but covers other interesting topics in Hi-Fi. So I took a chance and coughed-up. Will post if there is anything revealing documented. Does anyone know of this author, apparently he has written fo magazines for years, his site is quite interesting, look on  http://www.bdr-uk.dial.pipex.com/   and   http://www.jenving.se/direct.htm if interested.