I've had about a days worth of use with the PureFlow, and can comment a bit on it.
I don't know if it's because I am so used to the TV (that a small change can feel different), or if it's a placebo effect, or what, but:
I've been experimenting with different thermovape mouthpieces the past few days, and I asked myself exactly the same question! There is just enough variance between loads and hits within a load when nothing changes besides the relative charge on the batteries and the type of load. So I am always suspicious of jumping to a (wrong) conclusion about the causes of subtle differences. Anyway, what rang a bell for me when I read your message is that some of what you're reporting on the PureFlow is what I've been experiencing with the revolution mouthpiece. (
Which means that maybe both of us have been drawing in a little harder than is optimum).
I ordered the long delrin, the short ptfe, and the revolution mouthpiece (which has a narrower airpath, restricting the rate at which you can suck). I tried the ptfe first, without finding much of a difference from the stock short delrin. Maybe it didn't get quite as hot, quite as fast; or not. I don't gnaw on my mouthpieces, so the fact that the ptfe's a little softer doesn't matter to me.
I tried the long delrin next, which I actually prefer to the short delrin and ptfe mouthpieces. Not sure I can put to words why I prefer the long one, but I do. It doesn't make
any difference in the operation or effect, just in how I feel using it. It might be that I don't feel it getting as hot near the end of a load, or that I can direct the stream in my mouth better. Trivial stuff. For the small plus to the long delrin mouthpiece, there is also a small drawback. It makes the T1 longer, and a little more "fishy" looking. And it doesn't fit
quite as well as the first two, due to the lack of a tiny extra lip moulded into the short ones. Maybe the lack of the extra lip is for better compatibility with the revolution and juice heads. The revolution mouthpiece doesn't have the extra lip either. It
is perfectly airtight, due to the O-ring, it just has a minuscule wiggle the little ones don't; I'm being anal here.
When I got to the revolution mouthpiece, with its restricted airway, I did notice a difference in how my T1 was talking to me. It didn't take quite as long from when I started the very first hit on a fresh bowl before I started getting vapor. With any of the other mouthpieces, the very first hit on a fresh load was usually 95% flavor and 5% vapor. The second and subsequent hits were always killer, it just took almost a full hit worth of hot air going through the load before it started giving off significant amounts of thick vapor. With the revolution mouthpiece, the first hit is now 60% flavor and 40% vapor. And there's no change to my preheat-before-sucking time. It's the most obvious difference I see, and it's consistent. The other differences are more subtle, and I'm always stoned when I make these evaluations, so my conclusions are often not to be trusted.
Here are your comments about the PureFlow with my observations about the Revolution mouthpiece following them:
sessnet said:
Pros:
1. Seems to cool down the vapor
2. Seems to produce more vapor (as in more hits, not clouds)
3. Can draw hard, not worry about particles
4. Can taste awesome (even better than before?)
5. Give me more balls (feel like I can use it anywhere)
1. Haven't noticed any difference in vapor temp.
2. I not only get more hits, but more of them are huge vapor hits.
3. Same, but I don't fine grind my loads, I finger crumble them, and so I don't get much particulate matter with any mouthpiece..
4. Haven't noticed any real difference, always tasted great for the first three hits, then just fair for the rest (though not unexpectedly).
5. No change to my balls factor.
sessnet said:
Cons:
1. Can't tell easily (because of heat?) when it's "working".
2. Hard to tell, when outside, if vapor is produced...
3. Can taste like ass - if it gets black (expected).
4. Really tough draw at times.
1. Not too much heat difference for me, mostly. I think it's going to take more time and experimenting before I settle on whether I like the restricted airflow, or I should just use the longer delrin mouthpiece and not suck as hard.
2. Haven't tried it outside with the Revolution mouthpiece, but since I get more thicker clouds of vapor inside, I would expect the same outside.
3. Nope, no change in taste.
4. Well, it is a restricted draw mouthpiece, but I don't think of it as any tougher than the standard mouthpieces. The standard mouthpieces are restricted by the holes in the cap, but I'm pretty sure the Revolution mouthpiece is actually more restricting than the cap holes. (which is why usage changed with the Revolution mouthpiece, as I am no longer able to draw as much of an airflow as I did with a standard mouthpiece). fwiw, my cap holes need cleaning more frequently than anything else. (They're trivially easy to clean, they just get clogged with fine particulate after a load or two. I tend to clean the T1 every two loads or so anyway).
sessnet said:
Overall, I haven't used it enough to master it. I think this thing needs another week or two of learning, sort of like when I first got the ThermoVape.
I agree 100% with your closing note, only with regard to the Revolution mouthpiece. And I think I may want to try one of the black delrin glass adapters as a mouthpiece, not that it won't look even fishier...
Haywood