I am so thankful that Eugene started this thread and has continued it! All of you contributors of data are thanked most enthusiastically! As to Eugene's self depreciating humorous comments, he is obviously NOT a person suffering from psychological insecurity about an inadequate intellect. He's generously informative, comical, entertaining and mighty darn smart, thinks me! His 1 question to 5 experts, resulting in 7 new and conflicting answers is a perfect example. What a Great Thread!!!!!