Thank you very much Whafa! I was considering to post some of this message elsewhere, but did not want to be accused of posting multiple messages. Now that you have suggested it, I will go ahead. I also have found the MI is a great place to discuss everything--and also to get replies from people who are very good with their facts. I will look first if there is a more "related" place to post this message, which has more recent postings. If not, I will try the MI. Excellent suggestion!