Originally Posted by
fietsbob
There is a Kludge, requires a Big Bolt a matching nut and a stack of split washers ,
with that common hardware you tighten and clamp the fixed cup
then unscrew the cup via hardware clamped onto it.
Unless the fixed cup is damaged beyond redemption, just leave it in the frame. Removing it can be a major PITA, and re-installing it without the proper tools is unlikely to get it tight enough to hold securely.