I tried this tonight.
I mixed burmese cross, afgoo, chamomile, and peppermint herb. I felt less high, but more relaxed and less anxious than with bud alone.
tuttle, I use the flat end of the a dentist pick for packing, and the other side for removal. Fits perfect, and works amazing.
I almost positive this is the set I have: here
I use the PD exclusively. I use 1/3 of the chamber. I never go past a single hit -- no matter the situation or the grade of the bud. I am completely satisfied w/ the buzz every time. I also never go past two hits a week.
I owe it all to my beloved PD.
I experience this as well. I have a routine of vaping one to two times a week. If I break out of this routine, and take a week or two off, the next time I vape it doesn't get me as high as usual...
It seems T-breaks can increase my tolerance.