Hello, would you mind explaining what you mean by "the cross counts ruin the idea of using it as a gauge" ? Trying to learn a few things.
You can't just watch the NB and expect it to say "lean" or "rich." In closed loop the ecm will command the engine lean - rich - lean - rich, back and forth and if you connect a gauge to the O2 signal that's what you'll see. You can use NBO2 readings from the scantool or datalogger along with a few other values as a general indicator of lean operation but that's not the same as tying in a gauge.

I *believe* Mark offered to help you get a starter calibration going. He does pro tuning and I'm sure his prices are reasonable. OTOH, with the amount of days that have passed since you first posted, an hour per day would probably have netted a finished cal by now. If you start the process and post your progress as you go, you might find people are willing to check out the work and advise as you progress.