Pendean, thanks for your help.
I just tried it one more time, but this time switched to "engineering" units. I DO NOT recall any of the on-line tutorials mentioning this specifically. In fact you didn't say which units to use. I suppose this is just a given for those using this all the time. In any case, I can rest comfortably tonight having mastered this.
"They" say the definition of insanity is doing the same thing over and over again expecting a different result. Well, over the last two days, I thought I was going insane. I kept trying different settings but never the engineering one.
Thank you!
tom