I use a glass extractor with a micron screen and fill whatever size tube I'm using. I have a rubber stop on the top and depending on the color of the run usually determines how many cans I'll use. I've been experimenting with different kinds of butane from Vector 5x and Liquid 7x and I'm about to use Newport 10x. My last run I used 14gs of Green Dream and ran about 3/4s of the can and the run had been clear for a few seconds already. I let it then drip out into my pyrex that is in a hot water bath and empty out the nugs and finely grind them. I then respray with around another half can of butane. I probably have the same purge kit as everyone else, it seems like everyone gets them at extractionexperts.com, they have everything you need, its a little pricey but quality stuff and they know what they're doing and will help if you ask. I go from the hot water bath after popping all the large bubbles and scraping together, indirectly onto a hotplate around 140-150 degrees. I get it liquidy and collect it all on one razor and then transfer onto parchment. From there I start a cycle of vaccing and heating. I just recently got my vac so I'll do anywhere from ten 5 to 15 minutes at about -25(I'm hoping to achieve closer to -29). And then after holding the vacuum for about 5 to 10 minutes I air it out and put the parchment on a pyrex back onto the hot plate to get it warm again. And reapeat, thats my method I'm still working on it though.
I got a yield of 2.2 grams from the half oz and this Green Dream was pretty nice. I've heard with the larger run with obviously extreme high quality nugs is the best way to a high yield. Like the last person said, I've had friends get a quarter back from an oz of dank nugs and they used in between 3-4 cans of butane. I love bho and making it and just keep trying its a trial and error thing but its fun if you know what your doing and can get you super high. At first just try a process of hot water bath purging and go from there thats how I started, hope this helps.
