not sure about the tube.. im not sure if I would like the glass ones. I love my honey bee extractor. it works great, cheap too and safe (35$): http://www.ebay.com/itm/The-Original...item2322e068fb
and this is my vac set up that I just ordered. the desiccator is bad ass, dont think it gets much better than that for that price range. and I cheaped out on the pump. well see if I regret that in a few months I guess. it costs 250$ to vac purge oil, and thats with a pretty nice set up IMO... im sure you can go much much cheaper like a hand pump and a old jam jar lol... id imagine getting shattered glass shards in your liquid BHO wouldnt be fun though. and im sure you can spend 1000$ if you want, hell even 10,000$ if you want or 50,000$. its ridiculous. just for an extra 5% potency and 1% reduction in butane lol.
desiccator (120$): http://www.ebay.com/itm/190782290423...84.m1497.l2649... if you get this. it makes life easy. an easy life is worth tons of money. this is only 120$.... its VERY easy to apply heat in this desiccator (same as the SS dish from wal mart that I cook the oil off into, you can scrape it, then drip it onto parchment paper, then lay it in that SS desiccator, put that into hot water, pull a vacuum and let it sit. pretty simple I think)
vacuum pump (110$) : http://www.ebay.com/itm/121035768701...84.m1497.l2649
get yourself a stainless steel dish (3$ at walmart) or a pyrex dish (hard to scrape corners... can crack. for 10$ at walmart). pyrex is also hard to cook off because of the weird square shape. the SS dishes work perfect. you can scrape 100% of the oil out, and your butane dish will sit great in another SS dish full of hot water for prime evaporation. while youre at walmart, grap yourself a pair of forceps (7$ in fishing section, get good ones. tough ones) and a 10 pack of straight blades with in the tools isle (6$). grab a case of butane while youre at it, and maybe a few extra lighters, theyre handy to have around for this.
pretty much looks like this when youre scraping, works awesome... then just heat the back of the blade with 1-2 second flashes of the lighter, with 2-3 seconds between, maybe 2 or 3 times and all that oil drips off onto where ever you want it.... onto a piece of glass, tin foil, parchment paper (freezer to get it off), into a vial, or small drops right into the bowl if youre a pro.
20 grams of oil in the dish, then on the paper. I didnt even lose .05 grams in this process. its very efficient. can be very messy though if youre clumsy and fuck up!!! weve all done it.
after spraying. stick this bad boy onto the same sized dish, or larger, full of hot water, outside in the wind if possible, and let er buck!!