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  • The issue is that all the teeth of the cup are gone.

    I have a fine thread bolt and a large washer which I use to secure the BB tool to the BB cup.
    Then use a long metal tube for leverage.

  • No it was something else. Perhaps it wasn't you.

    It used penny washers: maybe you need two nuts, lock one of against the other and then turn the locked nut to rotate the cup?

    Of course the problem being that you need to remove the cartridge first...

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