firstly, you 'broke up' the bark if this means you tried to extract from sizable chunks of root bark you're never going to get max yields (you want to powder the bark as much as possible so you're maximising the surface area contact of bark to solvent; basically this way more dmt is exposed to your liquids and is then able to migrate away from the bark, in chunks it'll stay trapped inside there) 170g of caustic to 2L water should be easy enough to basify well, but perhaps bump that up to 250g just to be sure. Also, make your water pretty hot first, doesn't need to be boiling but say around 70 degrees celcius should be good, then basify (carefully and slowly). If the only warming your bark + water solution had was from the exothermic response of adding caustic to water, then no good - because dmt requires a little convincing to move into your extraction solvent (naptha i presume, if not it should be) - the solution needs to be HOT, real hot --i just saw you use zippo lighter fluid, seriously dude take this shit seriously, you just lost about 2 grams of good spice for no good reason, naptha is there no worries you can find it, if it's really that hard then contact some pertoleum chemical suppliers and source some hexane, easy done if you have the will back to it, you poured the lighter fluid into the persumably luke warm water, and separated.. do this: while your solution is REAL HOT, like just after you've added the 250g of caustic to the hotish water, right after that add 250mL of naptha, shake real thoroughly for about 2 mins (and CAREFULLY, pressure builds up here really rapidly). wait no more than 5 mins and siphon off the top layer (naptha sits on top of water) - or use a turkey baster. Quickly add another 250mL and do the same thing, now to re-heat your mixture add say another 100grams of caustic soda, shake real well, and add 500mL of naptha- shake, separate get a glass tray or good sized jar that you can fit your whole hand into, and put your three pulls in here. using a fan on low at a distance, evaporate the mix down to about 400mL ** put it in the freezer for two days and don't disturb it. after two days, get it out and pour off the solvent into something (have that something waiting) - decant it slowly, being careful not to let any dmt floaters get past. using a fan for about an hour evaporate any remaining solvent until the jar is dry, you'll have a nice amount of spice **if you're perdantic about your yields (which when you know the value of spice you will be), at this point you should use a hot water bath (just plug a basin and fill it with real hot water) and dunk your jar in here: the reason is, where you've evaporated down there will be a sticky translucent film that smells reaaal fucking fine, that's un-crystallised dmt. basically, get your solvent hot (if it was cloudy from the evaporating, it needs to be clear again) and swirl it around heaps to get those bits. I don't know exactly how much is there, but in the past i suspect i've lost at least a gram from shit like this, you don't want to lose a gram of spice do you? like i said, take this shit seriously if you don't, then you're doing a real injustice to the plants that are there to provide, it's like looking at a logging area that's fucking full of imperfect logs, shit they could have been firewood, paper, whatever, fucking disrespectful pricks imo.. don't take offence to that man, this is just my opinion so, well, what the fuck do i know? peace