Hi, Brian's chart and explanation are available at: http://james.parkinsons.org.uk/SJCS-3DSC2X.htm Simon --------- My opinions are my own, NIP's opinions are theirs ---------- Simon J. Coles Email: [log in to unmask] New Information Paradigms Work Phone: +44 1344 778783 http://www.nipltd.com/ Work Fax: +44 1344 772510 =============== Life is too precious to take seriously ===============