So here was my process...
found a piece of firewood, chopped it into a square, shaped it with a saw, drilled the hole and let it spin on the drill while holding sand paper of different grits until I didnt have anymore patience. found some oil oil I used on my deck, and some marine contact glue set the knot...not square, not a circle...definitely not fancy but it turned out OK looking.. Will give it a try tomorrow.

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