Help needed, advice on dismantelking baring holder/ballscrew

[magicniner]

Be careful, though, as there's a good chance that all the balls will fall out of the nut when you pull the screw.

Turn a length of plastic rod to the base diameter of the screw (bore to accomodate any reduced end on the screw) and run that into the nut as the end of the screw moves through, the balls will be retained by the plastic which you leave in place until re-installing the screw.