It's not so much as destroying the pen as destroying the click mechanism.
I have never tried this, (I always destroy the mech.)
Try this and tell me if it works. Wrap some tape around the clip etc. Then secure it in a collect chuck of the appropriate size. Place on the lathe and see if you can wiggle the clip, finial, and click mech. from the brass tube.
You will still need a new click mechanism from PSI!