Don,
Very nice mate.
Janel is right, engrave your name where suggested so that everyone will know who made it.

It looks like a lot of effort has gone into it so you deserve some long lasting recognition, especially since it's being donated. Whenever the box is opened, the maker will be revealed. As suggested by Janel, I don't think anything too fancy. Maybe right smack in the middle just 2 lines in script saying:
Crafted by
Don Barnhill
Cheers
Mike.