Just facts, no judgments or stone throwing... My pieces work on some units. Does this mean some units use different size glass? My glass size does not change, unless I intend it to and in regards to stems or coolers, no joint size change has taken place. I do not have challenges supporting other vaporizers. I have correspondence from other glass manufacturers who have same issues as I do with this unit. Although, I would never share another's communications without asking them first. So, to recap. A buyer approached asking why I no longer support the unit. My reply was simply the facts. Now, where was the wrong in that? And while I no longer offer kits for the unit, I do own one. Originally, I approached RBT for a demo unit so I could build a mod around it. They declined. (Post still available on FC). So, another esteemed FC member sent me a unit to use. And my glass, all my glass, fits the unit I was sent perfectly. Not just some of my pieces. Do I have a special beta unit?