SWIM's aware, but he's referring to having taken a dose that is plenty active but simply not as strong as SWIM would like and then taken a hefty portion from the same batch after a few hours.  SWIM's had similar experience with brews, as well.  It just seems to plateau 'til he comes down.  Maybe this is just SWIM's experience, but it couldn't simply be individual resistance considering the levels SWIM's reached in the past.  But perhaps it is just varying degrees of potency in his yields.  SWIM'll just have to be more meticulous in the future to assess the cause.  It would be great if SWIM could just take more when he's unsatisfied with the potency, not to mention having to take less in general.

SWIM got a very red, thick and hard crystalline resin a from a similar instance.  It turned out to weigh much more than he would expect from the amount of cactus and in consideration of the yields from previous pulls.  SWIM posted about it, and it seemed likely to be the product of reaction between acetic acid and lime.  SWIM figured it probably had some product trapped in it though, so he mixed it back in with the cactus.  This could account for some of the impurities SWIYs have been extracting, considering its distinctly red hue.  SWIM has a separatory funnel, now, so he wonders if that would remedy such aberrations with future extractions.