Re-post of original FBT photo.
http://suzaku.live-evil.org/0716221404.jpg
You can clearly see 2 turns on the heater winding on the core, should not be too hard to replace with the new wire ordered.
You can also see the crack (cracks) in the FBT outer layer which looks to be made out of some kind of hi temp tar, which was easy to melt with an soldering iron, there was a tendency for corona arcing from these cracks but saw no real carbon, and thought it very risky to try to remove it, so I covered it with several layers of dope.