Well to be honest I'm not familiar with AB extractions but in general you don't need to extremely accurate. I've been eyeballing for a while now with no issue. Orange dmt is pretty common, brown is sketchy but it wont kill you (hopefully lol). Your best bet is to wash it or re-crystal it.
read up in the nexus forum for a more intricate tek
washX"I bought a gun and chose drugs instead."
-Kurt Cobain
"Idleness is the beginning of all vice, the crown of all virtues."
- Franz Kafka