Credit where it's due
Someone in Japan found the image of a 4-moku goban amusing and referenced it in his/her blog with a link back. I'm flattered but the photo wasn't mine. I decided to find out who deserves the original credit.
I traced the image to David Fifield. He has an excellent site with instructions on how to make your own goban with medium-density fiberboard. His boards look quite good and I'm tempted to try out his procedures one of these days.