Just thought I'd add to this:
A few nights ago I tried a brew made with 50g shredded white Caapi, and 50g Peruvian Chacruna, both ordered from Maya. I got the effects from the Caapi that I'm starting to become familiar with, but I had absolutely zero effects from the Chacruna. I think my brewing technique still needs some work, but I have had it work before, and Maya is a respectable vendor, so I think it's safe for me to say that the Chacruna was either fairly weak, or I have just require a higher oral dose of DMT... So yeah, maybe it's the Chacruna.