So, of course, I grossly overestimated my final product. I have 4 grams dried and 2-4 more drying right now.

Things I learned: Grind the seeds! There is no such thing as too much filtering in the beginning stages! Double check the directions! Buy a damn vaccuum pump!

Thanks everybody for your help and interest! I'll be reusing my seeds for a second extraction in the coming weeks and it'll probably go a lot smoother this time.

I learned differents things : don't grind the seeds and use a PC (pressure cooker) = good yield and low filtration even without vacuum pump.

Oh. Well. Thanks for the tips. How long do you pressure cook and how many pulls do you do on them? You use acid I pressume?

3x30min (30min after the steam vent start to release pressure) is what i do and it's probably overkill, i guess 3x15min works well but i didn't try.

I put a dash of vinegar in water for the first pull and after i use just plain water but a small amount of acid is not a problem if you use a stainless PC.

A tip to reduce filtration and handle seeds more easily: the tea bag tek = put the seeds in a piece of cloth (cheese cloth or pillowcase e.g.) and pressure cook them like this. It's easier to collect water and you just need to press the bag of seeds to get the remaining liquid.

And how do you usually do as far as yeild goes?

Not sure to understand the question but yield can vary a lot, seeds are not standardised

Last extraction, it was ~4% of quite clean harmalas which is in the normal range.

Flep, if it was the manske giving low result for some reason, then you can base the 3 liter to retrieve the remaining via that way.

A good tip is to freeze the Rue then smash um up.
Less dust = less filtering

After i extract some seeds with a PC (yield 3,5%) i did an experiment with them:
- freeze and taw x3 and then coarsely squashed
- PC 3x20min
- yield 0,5%

My conclusion is to not add extra step like grinding or freeze&taw if you have a pressure cooker. Of course, it doesn't hurt but as syrian rue seeds are cheap and easily available i try to make easier than more efficient.
It wouldn't be my philosophy for a DMT extration, it would be efficiency first