'DMTang' ...  a new technical term  ! The last pull with hexane makes 'DMTang', you say....

Acetic acid is a 'weaker' acid, and so I guess heating a vinegar extract would help solubilize the tryptamines. I just let time and the pH do the work,  aiming for pH 2.0

Also .. an unfinished thought/notion about using organic acids like acetic acid - doesn't some tek somewhere suggest  to 'de-fat' in order to remove all organic molecules including the acetate molecule, as it is organic and partially soluble in some NP-solvents..?