Regarding round houses and chi: It seemed to work for Native Americans, igloos, yurt dwellers etc. As I remember history, N Americans were very dismayed at being forced to live in buildings with corners. In my little round cob house, I did have dreams that I might roll off the loft at night (into the abyss) until I made a little fence up there. Cob and round go hand in hand IMHO. Dulane