Just wanted to share my experiences with changa in my WHISPR vaporizer that I recently bought (this is the successor to the Iolite, and runs on butane at a steady 375 degrees F)
I recently made a 1:2 blend (NN and full spectrum) mix with crushed B caapi leaf. The vaporizing chamber on the Whispr probably holds about 100mg material. The vapor is very unlike that of my freebase smoking experiences, which are harsh and tend to leave a burning feeling on the roof of my mouth. Instead, it is cool, smooth and quite flavorful. After about 3 or 4 solid pulls I am feeling fabulous, able to function but partly disembodied, pleasantly merging with my surroundings without entirely losing my sense of self.
I highly recommend this approach to changa for those who are either not fond of the full-on "blast off" or those first timers who are nervous but too intrigued to ignore DMT. It leaves an afterglow that reminds me of being a child on christmas morning, a sort of immediate wakefulness and rejuvenation. I apologize for the seemingly inadequate description...it is my best effort at limiting an infinite, numinous experience.
Cheers to the nexus, that made this journey possible!