Well this sucks!! The damn flat head screw head on the copper adjuster rod for the linearity coil snapped off, but I finally got it loose using a combination of Goof Off poured in the track for the ferrite core and heating the coil by connecting it to 2 flashlight cells thus heating it.
I think I need a new core/copper adjuster rod assembly. Here is what it looks like..
I'll try to see tomorrow if my RCA 9-T-246 has a similar core in one of it's coils that I can scrounge as a replacement for the original core with the destroyed adjuster threading.
Been a lousy day between the rotten stomach bug that ruined my sleep Sunday night as well as making my folks tell me to skip school on Monday, and damaging this part. Ugh.
Edit: all this happened before your post Nick.