Thanks men. Where I live there's no carbonate I could afford or justify the gasoline to go after. And can't just buy whatever I have a notion to, due to shipping charges. Somewhere the spending must end, and I have to just make do. Somewhere in this thread you guys had discussed everything I need to know 7 years ago. I just need to figure the percentages-by-weight of the before and after, and hope for the best.
BTW PE. Thank you. I guess you meant I could actually carry this too far and make lye out of it if I'm not careful.