Hi there. I think we may have studied under the same master cho and I just wanted to check if it is so. The master cho I studied under also said he trained in Sun mu do and created Mu gong kwon. Did the master cho you know used to teach in St. Louis, MO? Is he missing his two front teeth? He closed the school and disappeared years ago and have wondered what happened to him. Please let me know if we know the same guy.