Thanks again, it's one thing to understand these things in theory, a totally other story altogether when
putting them into practice. I've read about string condition and neck angle affecting tuning, but didn't
really understand...now I have a better idea.
I've taken your suggestions seriously.
New strings - somewhat better
Shimmed the neck to change the neck angle, 1/2 of a business card under the edge of the body at the neck
to tilt the neck back. Made all the difference. String action is now at 1/16" with no buz anywhere on any string
over the full neck length. Bridge and tailpiece are now nice and low.
I also discovered that my frets seem to either be pretty tall, or else my acoustic playing style puts too
much tension into the string, I can make everything go sharp just by squeezing. Frets haven't been dressed yet
so that's next, along with replacement of the wiring and adding additional shielding.
Thanks again RGman and "another doug".
I'm learning, and even better having a ton of fun!