gunnercoops Member Member since Jul 1, 2009 Last active Jul 1, 2009 Total activities 0 Activity feed Recent contributions #Threads 16 years ago 33ffe530-6f94-444f-94f3-9a2b42845282 Hi Check out US patent 6,971,594. I too am looking to build one....was looking at a full size one, using 12mm walls...
