i just wanted to tell u what i do to make me small amounts of BHO..
i have a small glass flask/vial ca 10cm long and 1.5cm wide.
and in the bottom i used a glass cutting bit for my dremel, and made i little hole in the bottom.
then i cut out a circle of coffey filter to put in the bottom and a pipe screen on top of that to hold it in place.
and then i actually use hash ground to a fine powder. there arent much buds around here have to grow it myself if i want some.. but anyways..
with the filter and powder hash in the vial, just screw the bottle top on and gas it up.. then i collect the golden drops in a shot glass standing in a sligthly bigger glass with hot water to help evaporation..
from 4-5grams of hash i get about 1-1.3 grams of BHO. sometimes maybe alittle more or less..

btw. you migth want to put some ducttape or something around the bottle, it gets very cold..

sorry for my english but english is not my native language