Hi, These pictures added to the PBS wiki today may be relevant: http://pacificbulbsociety.org/pbswiki/index.php/… -- David Pilling email: david@pilling.demon.co.uk web: http://www.davidpilling.net/ post: David Pilling, P.O. Box 22, Thornton-Cleveleys, Blackpool. FY5 1LR. UK fax: +44(0)870-0520-941