Caapi leaf is all of that SWIM has tried so far, it seems like tobacco leaf, is rather delicate and burns nicely. He's been calling it "Changa" but in all probability could well be very best(a lot more accurate)to make reference to it as "Improved Leaf". Avatar art created by https://sethfnrzf.madmouseblog.com/17092177/where-to-buy-changa-copyright-uk-an-overview