Good to know. Now, have I just completely missed the info about not needing to neutralize non glycerin soap, or is this something that many people don't know yet?
Well...sometimes it gets cast in terms of the Failor method versus the glycerin method, which can make it sound like 'neutralization or not' is connected with 'water versus glycerin'. So people may think of it that way, but those 2 issues have always been separate.
You would only need to neutralize if you calculate a negative lye discount -- an excess of KOH. What people usually do now is no lye discount or 3% max -- so no neutralization. Even though Failor says there should be a lye excess to neutralize, it appears she wasn't actually doing that. Based on the typical 90% purity of KOH, which she didn't take account of, the recipes in Failor's book are calculated with a 0% lye discount and can be used as they are. "Neutralizing" would actually be adding a superfat by lowering the pH.
Then there's the issue of the liquid. Classically you use water, but it's become popular to use glycerin, which facilitates saponification. You actually should use both. The minimum water amount is the KOH weight, to dissolve the caustic. You can combine water and glycerin to create a 25% solution of KOH. If you're making a recipe that calls for more glycerin than that and you want to make it exactly, you can add more glycerin to make a 20% solution. That works fine.
The reason for using both glycerin and water is that it's easy and safe. Using just glycerin takes longer to dissolve the caustic, it can bubble over, and it has to be heated almost to frying temps.
As I mentioned, there are other solvents you can try with in addition to glycerin if you get in an experimental mood.