wmelvin and several recent posters: Please read the thread, particularly Part 3 (found here>
http://www.pprune.org/tech-log/45283...ad-no-3-a.html). I believe every aspect of your question(s) have been examined, discussed, re-examined and turned inside out through the course of those posts. Re-hashing those same discussions will not further our understanding unless new information comes along with such posts. I don't mean to be dismissive, but many here have been with this thread since the initiating event and I am sure you will find an enormous amount of info (along with a lot of dross, it is true) in the tens or hundreds of pages that make up the body of work here.