Hey Ken, I hope you get to work with Walnut, to me its a beautiful wood that one day I will have the chance to build something with.
As for plans, no but I did have some "Live Edge" Eastern Red Cedar that I made a small table out of and went with the look and shape of the slab. I to was concerned about the legs and getting them to Not" wobble. I made sure the bottom of the table was flat and when I cut the lengths of the legs I cut them all at the same time since they were so thin. I would have loved to have more wood for thicker legs but didn't have any so used what I had. For joinery I used pocket holes for the tops of the legs and stretchers and dowels on the bottom shelf.