Harmala Extraction: Is it safe to use an aluminium pressure cooker to skip having to grind and filter?

there is no need to grind or use a pressure boiler. i always just do multiple boils with acidic water in an open pod and it works fine.

you cant do the extraction without filtration, but you can replace most of the filtration by letting the freebase sink to the bottom and then decant the fluid. patience is key.

filtration is a pain in the ass to do, i know. especially the first passes before the first time you add base. most teks suggest coffee filters. i found coffee filters to be completely useless. what works pretty great are cosmetic cotton pads placed into a funnel. replace often.