@Steve, what do you think? The first set are the SH ratios, in both formats. Blue is RINSE, the green, yellow, and red zones (just a guess at the ranges, if you have suggested alterations or adjustments, please tell me).
The second is the math for soap mix ratios, given in % and in oz/gal, which I think is how most people tend to mix it. The math took a while to figure out for me, I’m sure the rest of you guys know it like the back of your hand. Anyway, there are two charts for soap mix ratios. One for 1/2" soap supply line, the other for 1/4" soap supply line. As you can see, you’ll have more control over controlling the soap ratios (oz/gal) if you stick with 1/4" supply line for the soap.
This isn’t my specialty, so I’m going to have a mechanical engineer check over my math and reasoning to make sure it all lines up, but I’m pretty confident in it.
Please share your thoughts and give feedback!