I don't know why he left, but this board has sure been lame since he's been gone....
.... no one is sure enough of themselves or confident enough in their knowledge to answer posts decisively, after having a know-it-all like Mr X around who was usually the last person to post in each thread.
I guess some of us will just have to take the initiative and answer the questions, and people will have to be aware that they take our advice at their own risk.