Basically I get decent trim twice a year, good for 4-5gs of oil total. So these are micro runs. I also live in SF and have no storage space so getting a ton of equipment for what's essentially $150 worth of oil is just not worth it. Not to mention I can get dispensary oil all I want for $30/gram... That said I hate wasting and enjoy the process, so is there a ghetto way to produce safe bho? I know a mityvac 25hg purge in a Bell jar is considered insufficient for some - any other thoughts?