The volcano is convection and probably the best vaporizer ever made. I got one years ago for vaping weed and it's the best thing I've ever tried DMT with. Pretty much makes it fool-proof and guaranteed breakthrough as long as you hold your hits. It's the most expensive vaporizer though, so that makes it inaccessible to most. But if you smoke a lot of weed, the volcano pays for itself in just a few months with how much you save in efficiency.
The company that made the volcano just developed new hand-held vaporizers for their product line. My buddy has one and it works a LOT better than any other portable vape I've seen, and almost as good as the volcano itself. It's called the "Mighty" and it's the next tool I'm getting and will be vaping dmt out of that in the future.
Another thing to note is that the volcano and Mighty both have liquid pads for their herb chambers. So you don't need any ash, weed, or whatever to pack it with. The liquid pad is a little wire mesh disc that is inserted into the bottom of the bowl for the crystals/oil to sit on. As it melts, the mesh absorbs it, increasing surface area and vaporization. Most pure and simple way to do it.
These are really expensive options, but they're kind of like DMT--indescribable in how different and powerful they are. If you're going to get a special tool for a special, life changing experience, you really won't be disappointed in the investment.
