hey as some of you know I'm going through my 30 year collection of high times magazines...I really wish you guys could see some of the outdated articles like this one...I actually built this thing back when the article first came out... you should have seen the looks I got when I was building it...pretty sure the guy at radio shack thought I was building a bomb...we would use it for the iso2 oil we would make.(my friend was a chemistry major and he did the actual isomerization with the sulfuric acid...without this step the oil was garbage.) I was definitely one of the first on these forums to vape oil edit iso2 is not quiso...it is a machine from the early 80's that made potent hash oil if you followed the steps correctly.