I had a pretty empty day today, so was able to experiment a bit.
What i did was try vaping a small and a large bowl on 4, 5 and 6. Starting from cold, let the nail heat on bowl for 5 minutes, drop herbs in, vape.
4: small bowl (literally a thin layer on the grill, not even a bowl) felt like a waste of time, good taste, vapor on the thin side. No real effects on my brain.
With a larger bowl on 4 i got some decent vapor out of it, I could still see through the glass, but an amazing taste and a really uplifting feeling. It took around 7 long hits to have my avb looking like yours just above, and vapor production to stop.
5: Both with a big and small bowls i got some great vapor out of it. I would say the same thickness as the Mighty with a water pipe adapter. Nice and thick, good flavour, nothing wrong with it. At 5 it usually takes 4 or 5 hits to reach the end of vapor production. The avb will be brown, but could be darker.
6: where the party is! On 6 or even 6.5 this thing is a beast. I know i have said it before, but this feels like smoke it is so thick. You can feel the oils in your mouth, you can feel the thickness in your lungs.
It will literally nuke a bowl in 2 hit. First hit turns it brown, stir, second hit turns it dark brown.
What is amazing is the ease at which it does it. With all my other vapes i always feel like you have to milk the end for ages to get every bit of vapor out of the herbs.
With the Herborizer you can just look at the glass go from white and milky to clear in no time at all, none of that thin tasteless crap at the end of a hit. Avb on 6 is dark brown like English Breakfast...
On 6 this feels like a magical healthy lighter to me. I am really able hit a bong like i would with a lighter. I never have to wait for the vape to keep up, it just runs along.
All this is with decent herbs, not USA grown top shelf, but i would say on par with what you find in most average dutch coffee shops... Definitely much better than your average UK street crap. Herbs are kept at 62% humidity.
Glass wise this is the piece i have been using:
https://www.grasscity.com/us_en/bla...ss-bong-with-cage-percolator-splashguard.html
I also use a bridge adapter to carb, it makes everything less of a faff.
https://vapefiend.co.uk/18mm-bridge-adapter
I might try to see how high i can take it without combusting next, haven't gone higher than 6.5 yet.
Going for 7, wish me luck...
Edit: 7 is too much for me. It extracted a pretty big bowl in 1 hit! Stirred, but nothing more came out, avb is very dark with some almost black specks, still no combustion, but to me this has reached the pop corn taste, and much of the good taste is gone.
I would say 4.5 to 6.5 is where most of the magic happens, with 6 being my favourite.
Also, i ordered some of these, they should help the loading procedure a lot.
http://www.ebay.co.uk/itm/262372409014?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT