Best extraction method. well tested

[evilscripter69]

use cold naptha in the collection flask. it can be filtered offright after the SPD is finished, the FB  does not dissolve in the naptha providing its cooled down enough on its trip down the tube. encase the horizontal pipe with dry ice, use an aluminum flex duct or a pvc pipe sectioned into halves and fill with dry ice, this worked very well. eliminating the evaporation of the NP from the collection flask, and greatly shortened the time of the process, SWIM's last run took about 1 1/2 hours to process 29 grams. at a temperature of 300 deg F 
in a 1 1/2 inch oil bath.