Indeed this 3K value is totally non standard, hence the 7.5K shunt on
a 5K pot. If I can find a decent work around to repair this unit in
such precarious predicaments, I will post this information for free. I
always have in other places.

If I could post an internal postmortem pic of a dissected pot, you
would see pot appears to be an linear wire wound. All repairs do take
time and needs the advise of very many good friends.

Once again, thanks for helping out.