nevermind... it was pretty self-explanatory after I took a closer look at the innards.
I filled it, let it sit for about fifteen minutes, and after a few drags it's already tasting burnt. I also got two new attys that I can't seem to get the horrid primer taste out of.
So... this thing can't be taken apart or rebuilt at all, it seems. I'm kind of thinking I just wasted fourteen bucks on two of them because I've found I need a good cleaning after about 2ml of the 100% VG VV juices.