the dab tornado looks legit but I just hate the look of the globe vaporizers, would rather have a straight sided one, metal or pyrex
nickel probably the worst, check this out from the CDC: http://www.cdc.gov/niosh/docs/81-123/pdfs/0445.pdf
the guidelines for titanium are totally not as bad...
First post on this thread for me! Started researching this a few weeks ago...waiting on an order form slow-tech. Definitely will post pics after I build some stuff.
While titanium it is a refractory metal its use may have health impacts. I was reading wiki and watching videos on mercury arc...