Hi Adam & Maria,
There are a huge amount of handshapes in the ISWA 2010. No doubt. I can
agree that there's has to be something close enough.
But if a group of writers feels that they need a new handshape for their
language, I don't feel like I have the right to tell them no. I think it
is a matter of respect and empowerment.
If we add a new handshape, it should be essential with multiple examples
of use. A unique handshape needed for a single sign probably doesn't
need to be added.