With 608-CageA now complete its time to go back to Cage B which we copied and mirrored from cage A before the chamfers were added.
In the outliner click on 608-CageB, select the Eye icon to bring it into view and close the eye icon of 608-CageA.
When we originally mirrored the cage from 608-CageA, we effectively applied a scale factor of -1 in the Y axis. Press N to open the Transform Properties window, You will see ScaleX:-1.000. To clear this back to ScaleX:1.000 we need to apply the scale to the object. To do this press Ctrl-A and accept "Apply Scale and Rotation". If you had simply changed the number in the Transform Properties window to 1 the cage would have flipped back to the other side of the bearing