CBC is a great additive for ultra potent DMT vape carts.
I've been doing some experimentation and have found that DMT homogenizes very well with CBC isolate. CBC is non-psychoactive and DMT and CBC mixed at a ratio of 3:1 yields a highly viscous liquid at room temperature. This mixture is well suited for disposable 510 thread vape cartridges with large oil intake holes for thick THC distillate.
I think this is interesting because I've found that DMT mixed with traditional 50/50-PG/VG ejuice is nearly solid when the DMT/ejuice ratio is 3:1. Liquid this thick performs poorly in disposable vape cartridges.
I put some 3:1 DMT/CBC mixture in a disposable vape cartridge with 3x2mm intake holes and a quartz coil. I find this cartridge to be spectacularly effective. You can control dosage by adjusting the battery's voltage. Low voltage gives less dense, more manageable hits and high voltage makes crazy dense vapor that will blast you off in one large hit if held in long enough.
If you seek a recipe for excellent DMT vape carts and are unsatisfied with carts containing PG/VG, try some CBC isolate.
update: after about 48 hours, the liquid has not crystallized and still flows, albeit very slowly. this is good because in my tests DMT and pg or vg at a ratio has high as 2.5:1 would have totally crystallized by now. and this is 3:1 DMT:CBC