re: Inlay using coffee grounds...

Terry,

I am amazed at what you have done! truly beautiful.
I am going to borrow your idea and also your last pattern if you don’t mind.
An idea flashed through my mind and I want to toy with it a little.

Walnut: Pocket knife, dremmel, palm router. gouges and chisels whatever works. They will all lead you somewhere.
I used a knife to define the edges and hogged the inside with a palm router.