Sun,
Click on the 'search' tab near the top of the screen and select 'advanced search' type David Webb into the 'search by user name' section and you will find the person who posts here under that name. His profile does not mention 747, non-the-less, he may be the individual you are looking for.
1) I happened to see that name on another thread after reading this thread.
2) I see no problem giving this information as it is all publicly available on pprune anyway.
ABX