Interesting... probably (hopefully) I'm never going to do a 'zene unless I live long enough to end up in some utopian future where some ultradiluted form is available in shops and society has advanced to the point that substance addictions are just not a big problem, or at least I can't see myself seriously thinking about going anywhere near them right now but still, pretty interesting.
When you say it has "no legs", you mean it doesn't have significant aftereffects, like a long trailing fade, or something else?
Could you say a bit more about how it compares to fentanyl and/or other opiates? Both in terms of subjective effects and stuff like duration, "legs", etc.