Acacian and I were just commenting on another post about this, shelite can be hit and miss try xylene instead. As for crystals don't expect crystals with Acuminata, you can re-x or use cold/ room temp shelite and freeze participate to get crystals but the yield will likely be minimal. If you got yellow goo from shelite (its still good and likely DMT). Your unfavorable biossay may have been due to technique or dose.
I would wager if it was yellow however the shelite was either warmed or the base was still warm.
Try xylene (end result is oil) but you can make changa or re-x.
I also find with Acuminata you really need to give the base mix a good shake when pulling, adding excess caustic soda should help deal with emulsion due to the high fat content of Acuminata. Loveall is working on adding vitamin C to help crystalize the end result (worth checking out).
As previously stated there's many factors in alkaloid content due to harvest time and variety etc.
There's zippo lighter fluid as well but I don't know anyone that has used it.
I would also add some people rate smoking the goo, many believe it adds to the experience and others have a theory that the oil protects the DMT from burning and aids in it's vaporization. I personally have no comment on that.
Disclaimer: All my posts are of total fiction.