Good post...just a side note, you can get honey oil using just iso and not butane, but you dont get as much oil as harddon's method (which I have used for a while previous to this method). Basically what he said about the iso extracting all the other things such as chlorophyl is very true, but you can keep it to a minimum by soaking the oil for a lot shorter of a period.

What I do is use the cut off 1 or 2 liter bottle bottom, fill it up with weed/bunk/etc..., then fill it up with enough iso to cover the weed, put it in the freezer for 10 mins, no longer. Take it out, strain it once only, any more and your just taking out chlorophyl which will turn your oil green and you wont get honey oil. Boil it down on just barly a simmer, when the iso gets low, keep taking it off as the iso starts to bubble from simmering, as it gets even lower, move the pot around so it burns off evenly (takes practice), take it off at just the right moment, use razor blade to scrape off oil. With a lighter, you can manipulate the oil to drip off the blade without losing any, but I would try that with just a little first, its really easy to burn it, then its no good. Anything I didn't mention, I do the same as harddon posted.

I went over to a friends house with a half shopping bag of bunk wanting to make oil, he showed me how to do it this way once and I have always made it this way ever since and have always gotten golden oil everytime, some times are better than others, but overall it turns out awsome.

Give it a try, tell me what you think. I'll make some if my grow turns out well and post pics.