well, the
thread is about the assumption it is the beta carbolines that are missing.
The extraction method using the mineral oil, 'should' dissolve all the alkaloids that are present, as well as any other non-polar soluble stuff like fats, oils etc. but none of the other 'water soluble' stuff.
then, when going back into the PG/Glycerine, only water soluble stuff can get absorbed, and there is non in the oil. so, we add acid (cream of tartar) to cause the alkaloids to become water soluble. As far as I know, that is all that comes out in the end, unless there are other nitrogenous bases in there that we (I) don't know about.
If this 'works' for you, then we have it narrowed down to the alkaloids as the key. If not...... then there is still a missing factor, requiring a different approach altogether. hmmmm. got me thinking again.