Id say, (and you can completely disregard this because I live in Australia, where diviners mint is for some obscure reason, prohibited) that you are probably not ingesting enough and in a quick enough manner to get the best results. Try using a bong, use the leaves as a buffer for the extract and lay that on top. Try and inhale all of the contents of the bowl in one long go, and preferably hold it in. Take every precaution necessary to gain as much from sally as you can, don’t half ass it and hope for the best, because this never works or brings the opposite, more negitive effects.
Extract is just that, the salvinorin has been extracted and reapplied to fresh leaves until it is either 5X or 10X ect, this is just the amount of times it has been processed and thus relates to the different strengths. I very much doubt you could obtain the sought after effects by just smoking the leaf on its own; use the leaf as a barrier between the hole in your cone and the burning extract on top, as to kill wastage and maximise the effects of the potentiated salvinorin extract. But don’t just jump in without looking first, do some research on the net; erowid.org ect...
good luck bro, just wish i could get it shipped to my house in as carefree a manner as you :lol: