Thanks a million to all of you who responded here and especially to Willum (Bill Norrie) for the useful links provided. I never cease to be amazed at the expertise you all share and how willing you are to share with those of us less knowledgeable! Indeed, as the saying goes: "Music hath charms..." but I have to add that the Forum members have greater charms as they share their sparkling advice and suggestions

Cheers and thanks again to all of you!

Ted