A1 Australian Made Mandrel Saver

No 2 MT  Pen Mandrel Saver -Designed and made in Australia

Mandrels can bend when you tighten the tailstock centre point into the  centre hole of the mandrel.

This system solves that problem because your  mandrel shaft goes through the hollow live centre. 

Your bushings press against the centre with no pressure on the mandrel shaft. Take away the locking nut to allow the nose of the mandrel to push against the pen bushes.
Make sure the nose of the mandrel is running on the mandrel proper and not on the threaded part as this is undersize and will allow the mandrel to wobble.