I got my 1 oz glass extraction tube today as well. So I weighed out an oz of trim, only about half of it fit in the tube. I packed it kinda tight but not too tight. Anyways, I thought Benassi said half a bottle takes 30 seconds to spray out, so I used that and had a friend time me. We did 10 seconds on 20 seconds off 3 times. I was scared the thing was going to blow up so I left pressure release forever (even though I think it released after 2 or 3). I think the only way I messed up was I used 2 of the brown coffee filters and the metal filter that came with the tube. Not sure but it seems as if half my oil ended up stuck on the sides of the filters (if that makes sense).
The butane came out the bottom though and I scraped up some goodness. I did the vacuum which did a little, but with that I don't think I was getting it hot enough to release the gas. I pumped it up to -22 on the gauge. Smoked some and really liked it but could taste a hint of the tane left. I'm going to purge it more later. Pretty lazy as the oil hits, fresh brownies, super kief laced joint, and bong hits have taken their toll.
I haven't weighed it yet.
pics: Sour Kush sugar trim (sour d X sage X larry OG)
The supplies
New tube
Probably about 12-14 grams
Freshly scraped
Post 2 purges (but like I said before I don't think it did nearly what it should have on the purge)