Wanted to add, if I remember right, after checking part numbers for the one piece ignition module/coil for the 4600/5000, that the part number was eventually updated to being the same used on the 6700/670/680 saws, would still like to try a one piece from one of those three to confirm, but they sure do look the same, first pic are from a 4600/5000, the second for a model 6700/670/680.......if these will work, it opens up far more options to locate a coil/module for the early two piece models.