Don't know about the eye. I'd feel weird anytime I put my palm of it.
But as I've said before, the copper and other inlaid bit you do works really well. I'm doubly impressed w. the UP inlay. Had some of the best days of my life up there. I know copper remains, but for a brief time, the 3rd largest silver production in the world, or so I've read.
And the agates out of Superior are wonderful.