I have a very guilty feeling that this thread has been aimed at me, following a posting I made a day or two ago. Your very detailed comments and explanations are so very much appreciated. However, as in so many aspects of life, these things are much more easily achieved if you are able to share them, or are able to be challenged by someone else in the process. Living alone, as I do, makes this very difficult, but I have printed off your post and will try to motivate myself more effectively by following your advice. Thank you.