I didn't know it until this weekend, but OCD has expanded his business from carto tanks to the tanks used in RBA (rebuildable atomizers).
http://www.e-cigarette-forum.com/fo...4-where-get-did-clone-glass-plastic-tank.html Things like the DID clone. OCD is truly an innovator.
He also seems to be able to do custom cut tubes.
https://www.ibtanked.com/custom-cut-tubes/22mm-to-32mm-od So perhaps if you have a polycarbonate-tubed tank that you want to convert to pyrex he can do it. I have to look into this deeper.
You're getting to be a tank collector like me, TNT!