Alan,
It's no problem at all. I realize that many times I come off as being an arrogant know-it-all. Personally, I am only too aware that I know so much less than some of the really knowledgeable folks out there. In that respect, I often go to people like Tom Kollenborn, Garry Cundiff, Bob Corbin, Thomas Glover and other researchers to fill in the gaps. When I do that, I will almost always give them credit.
When you have been at one subject as long as I have, you tend to have a lot of confidence in what you believe you know. Folks like you often come along and remind me there is much for me to learn. While I try to keep things on a level tone, I don't take personal attacks very well.
Take care,
Joe