Purity - Determining blotter content through cross-tolerence

[tron102]

SWIM has been finding LSD through a sketchy source, and has made some observations.

SWIM is mostly inclined to believe that the blotter does contain LSD, but has probably been stored improperly for extended periods of time. It takes 1.5 hits to achieve threshold effect, with a peak between 3-4 hours. Hallucinatory effects diminish between hours 6-8, with some after effects (clouded mind) lasting up until the 14-16 hour or so.

SWIM has tried several different blotters, all of which appear to be from the same source, due to similarities in the design. SWIM has experienced a +++ trip from three hits on one day, then a few months later, 3 hits may result in a mild +/++ trip.

SWIM has not eliminated the possibility of a phenethylamine substance on the blotter opposed to LSD. From PiHKAL, DON seems to be the most likely candidate. There isn't a particularly noticeable taste from the blotter, but SWIM does notice a very amphetamine-like feeling during the come up.

It seems the only sure-fire way to know for sure is through chemical testing, although I do have an alternative idea.

SWIM will be finding some Cubensis Mushrooms and 4-Aco-DMT within the next few days. Seeing how LSD, Mushrooms, and 4-Aco-DMT would belong to the tryptamine family, I know there would be cross-tolerance between each substance.

I'm assuming cross-tolerence also exists between phenethylamines, but am I correct in assuming that there would be no cross tolerence between phenethylamines and tryptamines?

If not, could SWIM ingest his sold-as-LSD blotter on day x, then the following day, either eat mushrooms/4-Aco-DMT. If he trips on both, and has no observed tolerence, would this conclude that the blotter contains a phenethylamine such as DON?

Thanks

tron