I think 2 and 3 may be the same. After my first total failure to extract from a paste that was too dry, I ended up rigidly sticking to a 3:1 ratio in my early attempts and only got goo. Now, I can crystallize citrate by reducing water content in the paste, but it's looking like the margin of error/optimal yield range is narrow for this particular cactus. I'm still climbing back up toward 3:1 to try to find the optimum, and oil tipping point, so I can't dismiss the possibility that some of the optimal extraction range might overlap the too wet to crystallize without drying range.

It also looks like some form of drying is going to be worth it to improve yield for the alternative acids too. So changing acids adds an extra step and two special ordered chemicals, instead of just the K2CO3. Changing up the acid could become a matter of preference though. I really love the way the succinate looks, but others may not care as much about that and would rather the most OTC option.

The other thing I'd recommend for the wiki is to suggest weighing the water instead of using volume. Issues with precision/accuracy may occur with common volumetric kitchen tools, especially with smaller scale extractions.