given that you took your “extract liquor” to -50C, I’m going to assume you that you pressed ethanol + dry biomass, not just field fresh biomass.
given that you put it in a freezer to achieve -17C, I’ll assume the extraction was done above that, and probably at rm temp.
a rm temp extraction with 190 or 200 proof ethanol should absolutely pull fats that can be dropped out by winterization.
however, that press liquor needs to be concentrated first…you want about a 10:1 ratio of solvent to resin. some go as low as 5:1, so they can winterize a little warmer.
assuming you used 1 gal/lb of 10% biomass, you’re looking at about 45g in 3.75liters, so you’re almost 10x too dilute to expect those waxes to drop efficiently (not an uncommon mistake).
you also want to freeze overnight. not just drop the temp till it hits target. crystal formation generally takes a finite amount of time…
see : Winterization