I tried my latest changa batch last night (4.2X caapi leaf extract infused onto 40% mullein, 40% peppermint, 10% wild lettuce and 10% lavender at 1:1 with fluffy white) and it was amazing to both vape and smoke. Incredibly smooth, both in administration and effect - the afterglow lasted about an hour.
Caapi was extracted with vodka over the course of 4 weeks, strained and evaporated onto the herbal mix, then infused with the spice using acetone. All my previous changa batches have used plain leaf, but didn't even come close to the 4.2X extract (that just how it came out - 10g of caapi leaf extracted and evapped onto 1g herbal mix came out as 2.4g when dried = 4.2X caapi). I use fresh peppermint harvested from my garden, dried and ground up in a grinder, but I can't see why peppermint from tea bags wouldn't work also.
/peace out brothers and sisters