I have used Jacks 321 and now TAP for my current grow for two years. I follow Jack’s published feeding schedule for both 321 and TAP. I grow in coco and perlite. I run a couple autopots and also top feed a plant or two. There are a lot of us out here.
I initially started using the 3.6 / 2.4 / 1.2 standard mix. But then everyone seemed to modify it and tweaking it so eventually decided to use the published schedule. No issues using it other than I have to either add Epsom or not decrease it ratably if I want to reduce ppms (mix at 75%)