ive been using a tek called TryptoTek from another forum, i havnt seen any mention of it on this forum tho.
seems to work very well assuming your using the exact ingredients an method thats described an it only takes a few hours, i just finished a 100gram ext that i started only 3/4 hours ago.
yeilds are pretty good, i got around 2 grams of a yellow impure colour spice, thats still really nice from 150g(shredded) of mhrb on my second attempt. the first was a 50g mhrb(powdered) an i got 700mg which was white to begin with, or very slightly off white.
the recipe says use powdered but i tried it second time round with shredded that i managed to blend up ok so it still works well with both shredded or powdered.
i need to figure out the best way to do it as ive got some dark orange colour solvent for some reason today but i think its cos i changed to a lighter solvent an i heated too much. the other times i used a bit of a heavier solvent an had great results.