[Tubejunke]

This is so odd as I was recently told exactly the opposite with the same problem, but with one of the larger coils wound on a plastic spool as found on a convergence board. Mine is a horizontal efficiency coil in my 64 Zenith. His idea is that the heat will expand the plastic and only further bind the slug. He said to use a drill bit 1/16" smaller than the bore and drill out the slug.

I guess either approach could work if done with great care as either way these things can and will turn to powder in your hands. Mine being an N.O.S. Thordarson replacement has fresh plastic which I don't want to melt of course. I was thinking more of a hair dryer than a heat gun. I was thinking a little heat and a grab with an EZ out might do the trick. The heat only being there to liquify whatever wax or resin that has ran through the slug tap.

One thing I do know is I definitely don't want to attempt finding another coil. Talk about something nobody has N.O.S. and so far no fellow collectors want to give up. Guess I can't blame them, but I never saw a post with issues there until I had mine go bad.