Thanks AJ, thats what I needed. Palmer said it was 3.4g for the CaCl2 and 4.0 for the gypsum with a level teaspoon. I have adjustable measuring spoons that use a slider to reduce their volume. I can measure small volumes quite accurately, but can only weigh within a gram or so.
Wobbegong youre fine. I was sloppy, I should have been more precise. Feel free to jump my butt as needed.
Gjabball, the whole batch is mash water + sparge water. If youre using RO you can put it all in the mash or do the mash and the sparge together. Either way is fine, just dont sparge with highly alkaline water.