I have absolutely no idea but I do remember the hours we spent discussing it on the phone. Maybe listers can help us. By the way the Isaac at Chipping Sodbury is a new one on me. I am now rechecking all our old mails and files and the kettle is on as well. Looks like it is going to be a long night. And the Pond Dipper hereby sentences Robert MILLARD to a pond dipping for mentioning Isaac first today. (LOL) Geoffro The Pond Dipper