Yes, at the other forum there was a lot of chatter about how this phosphoric acid tek (hummingbird tek, a no-heat extraction for oral consumption) would produce amazing results (more so than with HCL or other acids) with MHRB as low as 1-2grams/dose...with adequate MAO inhibition. I thought that they were pulling these other helper alkaloids (dark dmt, which I believe is a mixture of alks) along with the dmt.
The key to this tek was to do long cold soaks in about a pH of 3.
This may be the way to go when trying to acquire the dark dmt, or it may radically boost yields (or may not help one damn bit!)....do an a/b using phosphoric acid and then basify as normal using toluene or xylene as solvents.
Phosphoric acid is so cheap I decided to get myself some and try this. It probably won't be for a few weeks, but I am going to do 250g of MHRB using the standard vinegar tek I usually use and another with phosphoric acid (keeping pH, temperature, and time consistent) and will at some point post the results.