Roger, this bulletin board is visited by professional and amateur researchers around the world who are interested in what is being discussed here but who rarely or never post any notes. I hear from them by e-mail. And they comment on what was in one or another of my posts. So even if the information does not look useful to you or to the other people who are posting notes, there are other people who are interested. That is I believe one of the main purposes of this board. It is for announcements and research updates etc., not just for discussions.