you can modify a refrigerator compressor to be a vacuum pump. my vacuum chamber is made from a $6 dollar shatterproof plastic jar bought at walmart. i donthave a gauge but i can boil water at room temp
hey fdd i think you're on the right track with the water theory, i think thats why oil made with cured bud budders up faster because it has a little moisture content as opposed to bone dry buds or shake