This is an SOP that I compiled from experimentation and online forums. I never used butane in this method so please dont start talking about butane because I know how people love to get off topic. I did not use a closed loop either. This was all done using dunk bags in cold ethanol.
Dunk material for 15-30 seconds in -40 C or colder
Büchner funnel 14 micron in freezer ( if you have to use a faster filter paper to begin with then work your way down until it flows)
If too much chlorophyll was pulled then you can charcoal to clean up ( I was told that instead of using charcoal you can create a celite 545 bed with aluminum oxide on top and filter through that medium instead because charcoal will degrade thc levels)
Before winterizing, rotovape to recover some ethanol to make your mother liquid super saturated ( to crash out more fats when winterizing)
Winterize 3 days at -40C or colder
Büchner funnel 0.45 micron in freezer
Rotovape at 30 C to retain color and wet pour to get out majority
Heat up oven 110 F for 2 hours prior to use
Pour 150-180 grams per piece of parchment (preference) pour less for lighter color
Pull full vac for 4-6 hours
After you see bubbles slow down, ramp up temp 10 degrees to 120 F to loosen oil for more ethanol release
Bubbles slow down again then ramp up temp to 130 F and let finish off
Break vac and flip slabs and keep temp at 130 F
Let sit back in oven for 30-45 min to loosen up oil and pull full vac again until you get tiny bubbles or no bubbles at all
This will give you stable ethanol shatter with a nice orange/yellow color. The thinner you pour your slabs the better the color. You can use old material and still get a really nice color. If you harvest a little early and your trichomes have not turned amber yet then you can get an even better color. Give it a try and let me know what you guys/girls think.