12:1 ratio is best. The solvent needs to flow like water when laden with bho @ 0f.
Only need to vacuum purge if the film is thick using etoh.
No point in vac purging 2x.
Naw I'm not bothering. Its just a crowd of stoned hippies being marketed too. Lame.
I imagine they have a bigger venue.
Still I can get high at home or a vape lounge. The crowd, all the marketing and whatnot just turned me off. The only reason to go to a cup is if your paying to be a...
I wouldn't vacuum purge bho that will be winterized, rather in leiu of the vacuum chamber I would dissolve in warm (90f) ethanol and let the rest of the butane fizz off before freezing.
Post in concentrates section for more experienced extraction artists to say their piece.
I'd say you could hit 30% on an extraction with terpene content, perhaps better if done properly with bho.
More informative article
http://www.washingtonpost.com/investigations/holder-ends-seized-asset-sharing-process-that-split-billions-with-local-state-police/2015/01/16/0e7ca058-99d4-11e4-bcfb-059ec7a93ddc_story.html
The feds merely withdrew from accepting their cut from local leo busts. states can STILL seize your shit, just now they don't have to cut the big man in.