Dr Winterkorn, I have been on the list for one year now and to my knowledge this is the first posting from you. It sounds like you could be a valuable source of information to us PWP's. Hope you can stick around and share your knowledge and PD experiences with us. Lanier Maddux 63/1 N4AG Chattanooga, (choo-choo town) Tenn. Home of Lookout Mountain and Rock City ([log in to unmask])