If you repeated it, ESki, it was worth repeating! And I'll repeat it again. Not all boot alignment gurus would agree with us, but I like your statement that the basic requirement is that we can balance naturally and use all four edges effectively.
I agree. I've previously described a RANGE of canting that I think is not only acceptable, but within which personal preference is the BEST determiner of "optimal." Basically, if you can release and hold with both skis, with only minimal foot/ankle movements and no contortions of the knees, hips, or upper body, you're in the range of edging adjustments.
Fore-aft adjustments, as I've said, are more critical the stiffer the boots are, and they are MUCH more critical for some people than others. Skiers with shorter femurs, light slender hips, and longer, heavier, muscular torsos and arms (in other words, most men), have much less problem than those with longer femurs, heavier hips, and light upper bodies (most women). Shorter femurs and lighter hips mean that bending the knees has less effect on the fore-aft location of the CM, and powerful, heavier, longer arms and upper body are very effective tools for making fore-aft adjustments.
In other words, men can often compensate effectively over a larger range of suboptimal fore-aft alignment than women. It just isn't as big an issue for "typical men." (Yes, there are many exceptions, and I do not mean to suggest a generalization).
Those who really need an adjustment, though, will be amazed at the difference it makes in their skiing!