yeah well my tolerence might have gone up like fuck as i went through like a 2month period of taking it every weekend often during the week too
Strange I thought I already replied to this, apparently not.
I suspect that may be the culprit, along with some (but not as severe as you suggested) degradation. Tripping every week for two months will significantly raise your tolerance, especially to the psychological effects of a psychedelic that give its unique twist and magic. Combined with the fact that aMT is a serotonin-releaser (and we all know how quickly tolerance builds with those) makes me think that after 2 months of such dosing your tolerance to the effects would be pretty high and you'd probably get quite a mediocre experience after that time.
That combined with some degradation, and inaccurate eyeballing, could have simply meant you did not take enough for your tolerance.
Please get yourself a scale, you cannot accurately dose such a tiny amount by eye. Even such a difference as 30mg and 50mg can sometimes be hard to tell by eye, and with these super-potent drugs it's not something you want to mess up.
If you really are unwilling to use a scale, use
Liquid Measurement - just remember liquid measurement is only accurate if you know the total amount of powder you're putting into solution, so unless you know for certain that your vendor always supplies you dead on weight and never a little under or over, borrow a scale to weigh up the initial total, then you can put it into solution and not need a scale for the rest of your dosing.