Flyaway,
Such a large scale extraction is slightly terrifying to me. That is a LOT of lye and a (literally) explosive amount of solvent. If you really plan to use that bottle, I hope you have some good stainless steel funnels, a lot of long glass pippettes and a boatload of patience.
For the record, we have a highly respected bench analytical chemist here,
@benzyme, who has confirmed more than once that smaller extractions consistently give larger percentage yields. Apparently with smaller extractions the NPS can react with more surface area of the base solution or something like that. It has certainly been borne out in my work. My 100 gram bark extractions give less percentage DMT return than my 30 and 50 gram extractions.
I sincerely hope this extraction will be done outdoors, with 100% sober helpers, wearing protective gear, with fire extinguishers and gallons of vinegar on hand at a minimum.
This whole thread is making me feel like a nervous old woman. If something goes wrong, do I need to say it? Your life as you know it will end. You will wind up loosing everything, in jail, chained to a bed in a burn ward or whatever. In addition it would bring bad press down on our beloved molecule.
Please, I beg you, be very safe, and maybe consider doing a series of smaller extractions . . . .