I have the flowerpot now and it really does kick ass. Still love the volcano though. The temp fluctuation isn't a big deal to me. The flowerpot is a huge hitter though.
Okay so the Chinese glass came in...I call it, the VolcanoXhale
Honestly, not that great because between hits it just continues blowing vapor out, but it does work well which leads me to a 35-40$ obsidian! 65 if you really want to make it legit. I used an O ring from a smok tfv8 O ring kit I had from when I used to vape nicotine to get off cigs, and an 18mm female joint fits perfectly over it. theres even an indent on the easy valve nozzle for the o ring that works perfectly
Here is the plan for the chinese obsidian. 14mm male joint fits great into the easy valve bags. Chinese glass makers make a version of the vapexhale tube that has an 18mm male joint on top supposedly for whips. They even make them in multiple perc types, matrix, showerhead, circle, tree. then a 18mm female to 14mm male joint on top of that, which the bag goes on.
Example of the glass - note it even has a catch to prevent water from going into the herb/volcano. Can be had for 25-35$
If you really want to make it more legit you can buy the Planet Vape GonG easy valve bag connector for 30$ and use a female to female adapter on top of the piece, with the GonG easy valve connector going into that (your choice of size)
http://www.planetvape.ca/volcano-easy-valve-gong-adapter.html