I'm ready to dispute just about anything with you
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In this case somebody asked about the practice of "pre-harvest flushing", that's not the same as simply going to a zero-nutrient feed.
You say that going to zero nutrients makes sense and you present a 0 EC reading on the plant sap, which is all fine and dandy for me.
0 EC plant sap does not say much about the quality of the flower. Maybe 1 EC plant sap is just as fine.
Don't get me wrong, I think it's interesting that you measured that, at least you are collecting hard data instead of following some cargo cult. Having said that, I don't see yet what it says about the quality of the product.