a very dopey looking FBT
http://suzaku.live-evil.org/0717222342.jpg
there were some cracks in the outer " doughnut " that was allowing arcing.
but unlike the ones in the roundies, this one seemed ti be made of tar or something and not rubber.
there was no carbon tracks that I saw, just cracks and so on.
as far as replacing the heater winding, i really don't have the type of wire to do it right now, or really know what to even get to use.