Hi, Tom!

Thanks for the early weekend edition - it saved me a lot of time. Your O/B theory had been nagging at me this past week, because I thought you had dealt with it previously at this forum or in your educational pages. I was going to do some archive digging this AM to find your materials relating to it, when what to my wondering eyes should appear! There it was! Thanks for taking the time to spell it all out for us - good treatment and examples.

Joe