If I remember right, your great words of wisdom went something like this, "Fuck with AN nutrients and they will fuck with you.". I took that to heart as I learn how to use these nutrients. They really do simplify things and if one does like you say and don't deviate from manufacturer recommends, they seem to work. I get that it's hard to throw out everything you ever learned.
The AN guy said not to pay too much attention to PPM either but after adding nutes it should be around 1400, which is right where it's riding right now @1410 after adding the recommended nutrients along with
hydroguard and the enzymes. Looking back at the photos right after the res change, the ppm was 1390 so right where the AN guy said it should be.