Volcano's and vape bro's (whip style) always worked like a charm for bubble for me. Spec since I could just load up loose after it dried. Bubble in a Volcano is always fun when there is more then 1 person and you make a 5 ft bag.
I just want to apologize if I make the same threads over again. I had a stroke during my last surgery surgery and my memory is toast. Also my posts tend to not flow.
a portable hash burner/smoker is what the market needs. the $400 crafty/mighty is worthy for weed(well the mighty is, the crafty has a known fuse blowing issue) just not hot enough for hash. good luck with finding something that works.