It just opened the eye.... LOL The trick is a holesaw (92 mm) and 3 blanks. First a piece of wenge 1 inch by 1 inch, 3 inches long cut from 2 sides to make the eye. I don't cut completely through the wood, 1/32 is left. When done the wood breaks easy and the eye is carfully sanded.Very interesting and you've hidden how you accomplished it very well!