If all else fails, to remove the bb cup destructively but save the frame: Weld a long iron bar directly on to the face of the cup. The heat from the welding helps but mainly it is the leverage of the bar which never fails to get the cup out.
@sausagefingers started
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If all else fails, to remove the bb cup destructively but save the frame: Weld a long iron bar directly on to the face of the cup. The heat from the welding helps but mainly it is the leverage of the bar which never fails to get the cup out.