all i can say is ive got a volcano ive had it for about 6 months now and its the best fucking contraption let alone vapourizor there is, well in my opinion anyway.
they may be rather expensive but if you got the dolla for one its well worth it especially if your a heavy toker like me an dont smoke tobacco.
seriously though if you can afford one then get one you wont be dissapointed
there are quit robust to ive dropped mine a few times and it works fine,
an anyone who says they not as good as straight burnin weed, how wrong you are they are more efficeint an you can still either smoke the remains or use it for honeyoil.
most of my maters that come round wont smoke the volcano cos it gets em way too stoned. nothing else will do for me tho.
heres a link i found were tests where done to see how efficant and how much it reduced toxins in cannabis smoke
sorry if its been posted already tho
i think that trainwreck your probs are that you havnt tried a good enough vap try the volcano it makes me cough an i do about 10 a day. look at the creamy vapour in the pics thatl knock most hardcore tokers on their ass after a couple of those bag fulls.
try it an see

www.canorml.org/healthfacts/vaporizerstudy2.html

heres some pics of me volcano sorry if there on the wonk