there were a few guidelines as to why they like their numbers:
P 60 or less to not kill bennies
K 2.5 times the N value for drain to waste setups
Ca: Mg 2:1 ratio
S they all loved lots of sulfur
I agree the EC does seem like it would be high but I was gonna add water to get it to an EC where I felt comfortable trying it out.
it's based on Jalisco Kid and Dankworth on that forum if you want to check it out. just search for that string of ppm's i wrote down.
and the best part is I can do it with maxigro, maxibloom, calimagic and potassium sulfate.