It is 2 mm thick glass now, so 22mm outer and 18 mm inner diameter. It seems to be strong based on my experiences when handling them here. But I could believe a 3mm thick glass would be even stronger, and still would not limit airflow much. But maybe little bit limit vapors as the they are released from the top of chamber all around its surface area and now the tube connects quite seamlessly with the chamber. I feel only the herbs add resistance for the airflow, otherwise airpath is sized so well that you could easily breath trough this vape while having a walk and still get enough oxygen.
It is a longer for the video, to connect with the test setup with vacuum. The tube can be shorter, near the level of front panel, no problem, it just means that you have to insert your finger inside to move it up when releasing the chamber. with a longer tube you can get a good grip from outside too, for me it works both ways.
Nice vid! Maybe there's a way to telescope a MP so the glass sits flush and something extends out?
I also would like to see the chamber a little closer and how the Mouthpiece fits with it, is the material enclosed by screens or is it open ended?
Actually the glass tube can be telescoped inside, even if it is a longer one, if the herb chamber is taken away. It will then fit in the place where normally the herb chamber occupies the space. Or just have a shorter tube. I think some people might prefer a shorter tube for travelling and longer "comfort" tube for home. For me, it's perfect when it's about 15mm outside, and at least in my everyday situations, having it with me in jeans pocket, taking it out often, etc. doesn't seem to bother at all the small portion outside. But as I said, it can be made any length and even longer ones fit inside if the more robust chamber is removed.
There are screens on the bottom of the chamber, and on the cap that is placed on top of chamber