Hi dogmess,
Welcome to the Nexus. I'm not sure about the answer to your questions but I suspect they will come soon.
I would like to encourage you to check the Wiki link in the upper right hand corner of the forum for a huge amount of useful information, not just about DMT, but about how to safely extract it at home. You will also find teks for other entheogens there such as mescaline and salvia.
I suspect you are in for a series of pleasant surprises coming up. At least in my experience, Salvia Divinorum and DMT yield a type of convincing, 3-D immersive, "breakthtrough" type of experience that is seldom achieved even with high doses of combinations of other materials. But, the price is steep. Steel your surrender skills. You will need them. Get ready to completely let go of EVERYTHING, including all your assumptions. . . . .
Welcome to the Nexus.
Peace & Love
"But even if nothing lasts and everything is lost, there is still the intrinsic value of the moment. The present moment, ultimately, is more than enough, a gift of grace and unfathomable value, which our friend and lover death paints in stark relief."-Rick Doblin, Ph.D. MAPS President, MAPS Bulletin Vol. XX, No. 1, pg. 2Hyperspace LOVES YOU