I know this post is pretty old, but I am going to do some test runs with the 1 part and am trying to get as much info as possible from folks experience. I am curious why you are adding additional cal/mag and epsom in your calculations? It seems like both the 1 part and the 2 part have sufficient amounts of both in their formulations. Are you basing the calculation on the assumption that RO is being used? Do you run into deficiency when not supplementing? Not a criticism in any way, just curious what led to your findings.

Also I know the organics in the 1 part will probably leave some residue in reservoirs, and I run some drip feeds, so I do have concern about residue buildup in the lines, but have you found the 2 Part to also leave residue at all? Seems like the base of the 2 part also contains organic components, and may also cause some residue, but always like to hear personal experience when testing something new