Not much in the way of progress pics but I have a couple of the fixtures I used and the finished product. The sprocket, which is kinda heavy, about 15 pounds I think, should help keep it upright and provides purchase for spinning the top section. The round wooden base is stationary. A simple 6" lazy Susan provides the spin. Maple wood with cherry stain and Natura 2 part oil finish, similar to Rubio monocoat.
