i normaly use the butane method(slightly different then yours bubblerap) check it out.....
first i fill a 2L with my best trimmings about 3/4 full,,then i make small hole in the cap for the butane tip to fit into..
Then i jam about 10 bottles of butane into the 2L filled with trimmings(important to let the air that builds up out after every bottle)and letting no air to enter the 2L or it will freeze and be no good for oil..
After all butane is in the bottle i replace the cap with a new one without a hole in the top and let the butane sit in there for a few days(swishing around once and a while).
Now its time to strain ...take the cap off and strain through 15 coffee filters put together and drain into a see through cassarole dish..
Once its all drained out i then place the dish into hot water (about 3/4 the way up the dish and getting no water into the dish) and let all the butane boil off as it will start almost instantly once the dish touches the hot water..
Now your left with some wicked honey oil at the bottom of the dish(thats what we call it anyway)..
No chance of hurting yourself or others lol and it is wicked oil....hope anybody who tries it enjoys ..thnx,.