OK so here's SWIM's procedure.
First he grinded 150g of rue with a coffee grinder
Then he added maybe 700ml of water in a pot, a bit of vinegar (didnt measure) and boiled for half an hour. Filtered using a course filter like an old t-shirt. He repeated the process for a total of 3x and in the end threw the solids away and kept the liquid.
He let it decant in the fridge overnight, poured off the top part and threw the bottom decanted part away. He put it back in the pot, reduced in low fire to 1 liter, and decanted once more overnight.
Then he again put back in the pot, just warmed up a bit and added pure sea salt (360g for the liter). Back into the fridge again overnight. Next day he threw the top liquid away and redissolved the bottom decanted bit with 1 liter warm fresh water.
Then he proceeded to add sodium carbonate until the solution stopped changing colour, as seen below. Notice the colour changing as the sodium carbonate hits the water:
SWIM had 2 containers, notice the difference in colour between the right one which he had already added the sodium carbonate, and the left one which he was just starting.
The colour changing means the alkaloids are precipitating. Check this close up picture of the glass, one can see tiny freebase harmaline/harmine crystals floating around already:
Then he left overnight in the fridge again. This time he poured out and threw away the top part, and he filtered the bottom decanted part. To filter, he used an improvised vacuum filtering system using a funnel and filter, an hdpe bottle, some tube and vacuum cleaner, as seen below:
This stuff is horrible to filter. One cant use a coarse filter, but typical paper filters always block. Even with vacuum he had to move the filter around a few times to get it working:
Also one issue is that, once its filtered and dried, to scrape the harmalas off the filter is a bit troublesome, as quite a bit is lost to the filter (or else one starts scraping fibers of the filter together)
Now everything is outside drying. There are maybe 2 different purities, one is lighter brown and the other bit darker brown. He thinks he might redissolve at least the darker stuff in acidified water and repeat the whole process, but this time having much less impurities to deal with so hopefully all the filtering and stuff will be much better. Also repeating the acid+salt+base steps, he hopes to end up with very pure stuff.
Here's the rue drying, one in a filter and the other on top of a plate:
