Well I just had a proper roast of it, trying what I mentioned earlier: removing the glass screen tube. The vapor is hitting the cylindrical inner wall on its way, but I have a feeling it's doing that anyway. Couldn't detect any difference in taste. I put a metal screen in front of the airpath - lodged in place into the rubber, worked like a charm. I did of course still use the bigger mouthpiece tube.
It's quite liberating to be able to draw on it speedily and fully into your lungs. Those four little holes on the glass stem really limit your intake and they make pulling the Ascent a bit of a chore. I'm in definite agreement with those saying vapor escapes from this device, and by widening the air path a bit more, I might have even caught more vapor that otherwise would have escaped.
Having the open pull also let me feel around where air might be getting into. It's the middle. It's not airtight, you can cover it with your palms and feel your draw getting tighter, coming straight from the silver opening on the bottom.
2 friendly tips for DaVinci:
1. Another approach to the glass screen. I picture an inner glass tube that's open on the end, looks like a bowl and is designed to hold a replaceable screen, all matching the oval shape of the bowl. Ability to pull at normal speed = good. And most definitely is getting you MORE vapor.
2. A chassis where the middle doesn't take in air. This is probably a bit more extreme requiring fundamental re-design. It might not be possible with a swiveling portion that bisects the whole thing. It'd have to be something that closes airtight at that section, leaving only the bottom open. Some kind of coverable carb or lid on the bottom would be a great idea too.
As the Ascent stands now, you're pulling through those 4 tiny holes to slowly get air including non-vapor coming through the middle. It's no wonder we're all complaining about it depleting our herbs for scant vapor. It still gets me blazed, I might keep using it this way but it looks a bit wacky indeed with the screen sort of stuck into the inner airpath.