Don't get hung up on specifics.... dump a pile of leaf and stock (with a few buds) into a pound or two of butter, add some water to keep the greens covered and stick in a slow cooker for a few hours.....(I'd say 6 minimum and 22 max) Strain it and squeeze the hell out of the cloth (clean dish drying cloth works in a pinch).... it all works.
And Jazzboy... don't use 2 quarts of 151 for green dragon, try 2 ounces with one oz weed. You only need a few drops to do what several shots of yours would do. If you want to make some totally knock down peanut butter cookies add some green dragon into the cannabutter once it's melted.....Couch locked for 20 hours.....