I've recently acquired a PFM III in black/chrome. It wrote extremely scratchy, from any angle, even on the smoothest paper. Upon inspection with a loupe, it seems the nib was ground/worn unevenly, and one of the tines was so thin it was almost non-existent. It was also crooked, so I tried to straighten it with a shim... and the tine snapped right off. (about 1mm, it was razor thin)
After I told myself that this nib was dead anyway, I ground the nib into a stub. Now it writes wonderfully! Smooth and wet. But now it's about 1.5mm shorter and has no tipping, so I imagine the gold won't last very long as a writer.
Can/should I get it re-tipped? Would re-tipping extend the nib by any length? Or should I just hope to find a replacement nib unit? (They're really hard to find!)