Honestly?
He could have rounded the pour edges a bit more to make it smooth,, as well as the obvious straight band saw cuts of the antler, it's too mechanical in it's presentation to be really nice.
It's Ok, to smooth and round those edges.
The small brass rod insert for the short start would be handy in it's position,, but the long end brass rod given it's position to the sharp band saw cut's of the horn would hurt if actually used to drive the ball further.
And there could be a little less epoxy exposed.