I too built a WBS. They are a great conversation piece and look great on the patio. Unfortunatley, mine is currently down but not out. My error was not accounting for the central California heat. As hard as I tried, I could not keep the moisture in the wood which eventually led to air leaks and uncontrollable temperatures. I have plans to revive mine but am waiting to see the results of some improvement ideas when I made one friend. He's doing the finishing touches this week.
Here is a link to my thread if you are interested.