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Actually, "BTZS For Dummies" might be just the thing! Or rather, "BTZS Lite" which would involve no testing. Pick your film/developer combination from the BTZS database; use expo-dev to keep track of things in the field and generate Gbar numbers; develop using tubes per instructions. This should work quite well for someone who can work carefully and follow directions. The most likely sources of error would come from variances in light meter calibration and darkroom thermometer calibration, but there might be a work-around for these problems. (For example, you might send your light meter and thermometer to Fred newman who, for a small fee, would compare them to the reference light meter and thermometer kept in glass cases at the BTZS Bureau of Standards and report to you correction factors you should use when metering and developing.)
Personally, I found the conceptual understanding I gained from reading BTZS 4th ed. and doing the tests (including graphing by hand) invaluable. But I know several photographers who might use BTZS procudures and data if they didn't have to do the testing, and could go directly to real field work.
As you note, however, Phil might prefer that those of us who use his system do so with some real understanding of how it works.
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