Edit: Thanks Mike, you were typing faster than me:
Dog is questioning your numbers because of the decimal fractions (the ".4" and the ".8"). Taylor kits can't really get that kind of resolution, but Pool Store results show those kind of fractions. How are you getting those numbers? If I think my FC is between 5 and 6, I'll call it 5.5. CC is 2 drops = 1 or 1 drop = 0.5, like that. But never more accurate than that, like .4 or a .8.
The question about the tank is much more difficult to advise. Some folks use 31% undiluted, others use the 14%, or dilute the 31% half and half with water. I use 31% but diluted 2 to 1, that ends up about 20% strength. But that's for an IntellipH, which is similar, but different than an IntelliChem. The settings for my unit are dependent on the dilution I use. I can't change the dilution without adjusting the settings. So we first have to figure out what dilution, if any, you're supposed to use for an IntelliChem, and if you use something other than straight acid, if you somehow can tell the Chem what dilution strength of acid is in the tank, or else it'll have no way to know how much to squirt. All of which I have no clue about. First step, see if the Chem manual describes what dilution, if any, to use. Next see if the controls allow you to input the % of acid used. Then give it a go.
Or, which is what I
have been advising, is to shut down the IntelliChem, see if the ET can keep the SWG going without it, and dose for pH manually. This will be a good way to control pH while you study the IntelliChem, and it'll give you a feel for your pools acid demand, plus teach you how to dose manually, which is a skill you should have in case the Chem ever fails. And the methods for doing that, and the numbers you give us,
are something we can help
you with. Sorry, that's all I got. I don't know how to use an IntelliChem, so until you do, or find someone that does, you're going to have to wing it alone, or go manual. In the days we've been working together, no one has stepped up to help us with it, because there's not a lot of folks that have one. It doesn't get discussed much on the forum, so we're not really set up to give good advice about it (or maybe that's just me). Hey, maybe
you'll be the one that becomes the expert and can help the next guy!
You've got amazing equipment, but it's a bit outside the norm, so a bit outside our collective knowledge.