From what I hear, acetone and lemon extract are the best mediums of extraction, but I generally use ghee (butter with the milk sifted out.. costs slightly more than butter
but it's pretty easy to make at home). The shit fucks you up excellently. I wouldn't have survived through today's assembly if I didn't have a couple brownies right before. I've also started using coconut oil to make THC pills, which are bangin. In fact, right now I'm makin some out of some ground-up stems.