My recent extraction was 1700ml water:226g of bark:113 grams of lye. Worked very well. Seems that i've got just under 2 grams from 2 pulls. I used the tek from lysergic on mycotopia but just halfed everything he used. Very good pictures from this tek which is pretty much the reason i decided to use it  anyway, ratios dont seem to matter THAT much as long as the PH is high enough to get through the bark, and enough water for the "goo" to not be too thick.

Then again i am basing what i say on reading as i have only tried 1 tek but it worked!