Used the jacot tool again, result is not perfect but better than before, i hope so at least. Ruined that nice curved shoulder of the balance pivot at the main plate side. Learnt a lot again, the tool came with the jacot tool measuring the pivot diameter is cheating, suggested that I have to use nr 15, but i had to go down to 9 to make things work. Figured out with my microscope and with my caliper after wasting a couple of hours spent in confusion. Caliper showed about 0.11 mm diameter, not sure if the jacot tool 15 would mean it is 0.15 mm or just a number.
Before:
After:
The pivot from the balance cock side cannot be perfected without reducing its diameter and I don't want to replace its jewel. I am looking for a rub in jewel / or modified friction fit jewel for the other one at the moment. Pushed out the old one.