I've had my new TFV12 tank for a few days now, really like it, the cloud and flavor is great, I finally opened it for the first time today so i could drain out the little bit of old juice left before i added more. Unscrewed the bottom, emptied the juice, made sure o-rings where in place and re-assembled, the tank does not leak at all, however the pyrex glass seems to spin freely around the tank when I move it around which seems odd and it didn't do it originally. Is it something with the o-rings that cause this or am I missing something?