Yeah I even tried a whole nug in that grav lab taster stem with the glass screen and got some bits through lol I only took a few hits, then flip the nug for a few more, broke it up and then used my normal setup to get more out of it.
I was surprised to find out the screen is not actually a glass honeycomb, but more of a ratchet spoke gear, slits surrounding glass disc, still kind of cool and still kind of works. But the bowl is very large and yeah even with a coarse grind hard to not get bits coming through...
I will say that it works and the vapor can be quite tasty, but it can also be harsher with more plant material coming through to irritate your lungs and throat... plus yeah you don't have the cooling unit or even j hook or d tube like I'm mostly using with backwards Milaana stem / Delta3D screen.
I ordered two of these, but so far it's not the best experience for me, thinking someday maybe I will find a glass worker who can at least turn it into a bent stem... That would help with the cooling and catching more plant material?
Anyway it's still pretty awesome that they fit, even if they're not as ideal as I was hoping!