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Dave, correct information, but you did not address his real question: Is
the nanovna-saver 0.4.0 calibration dependent on the nanovna internal cal?

I was taught (back a couple of years ago) that nanovna-saver reads the
calibrated data from the nanovna. So on nanovna, you should do a
wide-range calibration, and use that cal whenever you use nanovna-saver
calibrations - both during the nanovna-saver calibration, and for all
measurements with nanovna-saver. Alternately, you could reset/disable the
nanovna calibration whenever you use nanovna-saver, but sometimes that
caused problems due to an out-of-range raw data value from nanovna. Back
at that time, I verified that this was correct.

Has nanovna-saver been changed to read the raw data and deal with the
out-of-range problem? Not that I am aware of. [But then I mostly use
nanovna-app nowadays.]

And Dean, in answer to your question, if you always use the same nanovna
cal when using nanovna-saver, no nanovna change is necessary when you
change ranges, etc. and calibrate in nanovna-saver. This is because the
nanovna-saver calibration compensates for whatever it sees in the data from
nanovna. Ideally, the nanovna calibration will have a wide frequency
range which is a superset of the frequency ranges that you will use in
nanovna-saver.