Allan, the best book, the palette of a master, the most expensive brushes, none of these can make me a perfect painter, but they can help.
Those glasses are deceiving, obviously you can't entirely rely on them.
I found them useful when checking the drawing, as by eliminating colour distraction they make it easy for me to see drawing mistakes.
I have checked them out by looking at pastels on the first day I got them, and they distort tones as much as a photo can distort perspective. Still we all use photo references and correct perspective with our own experience!
But anyway, I found your researches on colour and light relationship very interesting. Did you manage to start painting again? You sound as you are spending a lot of time thinking!
Ilaria