then nib is an entirely wrong term.
Discussing the use of a relatively useless ornamentation is one thing.
Then getting into a discussion about what it should be called?
How the devil can you use the nicker to scribe a line? I'd like to see anyone get the nicker down on the wood since it is flush or below the level of the saw's back.
My having tried this once after someone suggested it gives me the impression of anyone who suggests this use hasn't tried it.
Until someone comes up with a historical reference document, it seems using it as a string holder for the tooth cover is in reality the best use.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)