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So you had no success getting the slug out? What are you using for an alignment tool? It is important you use only the correct tools.
I should have said on the outset of this adventure, normally the alignent is fairly close. The sound IF is narower bandwidth and is best gone over more concisely. The traps too need a little adjustment but they should be fairly close.
Because the video IF stagger tuned stages are pretty tuved for a broad response, there was really no need to perform the steps to spot align each stage. All that needed to be done was first sweep the overall video IF and only perform a few touch ups to get the response in the manual. I would only resort to deeper investigation if the response is bad and not easily corrected.
When looking at the overall response, and knowing where each of the stagger tuned stages is tuned to, you would look at what part there is a deficiency and adjust only slightly the appropriate stage. For example, the 22.1MHz marker is too low or not in the right place. I would first slightly adjust T103 bottom in combination with T105 bottom to try and make that part of the response correct at that point. Or the video carrier is not at the 45% point, I'd adjust T102 bottom and T104 bottom only slightly to fix it there. Only vey slight ajustments would be necessary. If that fails, then I would shunt each stage with the 330 ohm resistors and check by sweep alignment of the T1/ T101 the overcoupled Tuner to 1st IF link. In every case only a small adjustment while looking at the bsweep and if the adjustment makes it worse to back off and put the adjustment back to where it was before moving somewhere elese to adjust.
Unfortunately the adjustments now appear all over the place. You will need to highlight how much you adjusted to try and undo what you have done.
I repair clocks and watches and fine machinery. I wind and make my own transformers if the originals are damaged. I do not know what experience you have repairing these things. But the core can be removed and I believe a standard hex hole core slug can be used as a replacement.
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