I have a modern Pelikan, and would like to take apart the nib unit - nib/feed/ring.
I remember in the past being able to use two thumbnails to push down the ring with the back of the feed on a flat surface.
Maybe my fingers are weaker, or nails thinner - but I don't seem to be able to do this with this nib/feed/ring
I could use a knockout block. Or maybe work on wiggling out the nib first. Or some other way...
What's the best way??