why don't we make a database where all of swims could post their extraction results maybe using a common form to post them as:

plant matter used
tek used (solvent,base,acid,quantities,boils..etc)
percentual yield
pics if possible
personal impressions
for exemple i would know how lower is a stb yield compared to an a/b,has any sense to do a a/b extraction in countries where the people have no problems to find lye and it's very cheap? swim spends 2€/Kg