Hi all you knowledgeable Fisher swingers,just wanting to know if a Fisher I.D. Excel coil that runs at 6-5 khz will fit the classic X Series machines,ie 1236,1266,1270 etc?? I live in the U.K.and trying to find a good 2nd hand coil for my Fisher X series machine and have the chance to buy a Excel coil but dont know if it will be compatible so asking here for advice,thanks in advance.