..it's a bit of a mystery to me why some people get results vaping and others don't..am very appreciative of the effort steppa..
as far as positive vaporising results that i know of personally, other than myself and two colleagues, there was Jim de Korne (ER founder, who i used a correspond with a little) ..in both cases the resultant product was blue-grey with hint of purple..in both cases the Hoffmann technique was used to the letter, meaning there was no heat at any point in the process..
and there is the report in the Lycaeum link given by sbc1 above:
For matters pressing the elves induced me into what they described as a 30mg vaporized crystal experience. It came on about 1 minute 30 seconds into the induction. The initial rush was more profound than vaporized DMT experiences but not as intense as 5meodmt vaporized. The visual aspect was that of DMT and maybe even a bit more, hard to say, there was much going on.
Auditory and physical symptoms persisted throughout the 20 minute peaking experience. The come down was much like the downside of oral administration or fungi. After effects persisted for about 30 - 40 minutes after peak.
and then there was jamie who got mild effects with a very crude extract..
either we are all mad, or there is something quite tricky about the chemistry of Psilocybin..which there is really..
as far as 'salt/freebase', as many have said, being a zwitterion makes things not so straightforward...
definitely the addition of acids in the process will create Psilocin (which may behave differently in terms of pyrolysis than Psilocybin)..as far as purity of extraction, i think even the smallest amount of sugars will interfere with pyrolysis..
as benzyme pointed out earlier in the thread, exposed Psilocybin will almost immediately start pulling in impurities from what's around it (moisture etc), which again will affect pH...and also the vaporising temperature of Psilocybin is much higher than dmt/5meo freebase etc....
as Shulgin has said, with Psilocybin 'the numbers don't add up' re more ordinary alkaloid chemistry...
so, i don't know what the answer to why some people get success vaporising and others don't...i hope through collaborative research the mystery is solved one day...
i would definitely agree with the above Lyceaum report as far as duration etc....
not being an advanced chemist, though, i'm not sure what other approaches to suggest....i wish all researchers and explorers good luck..