I've been analog free for over 4 years now, thanks to Volcano, and I purchased the "BCT System" from your great kiosk in NJ from your very knowledgeable crew, not to mention the Great Manager Kitty Greer!! However, I still prefer the "Lavatube System" . My BCT tank started to leak right where the metal sheath meets the plastic tank! Maybe mine was a defect? Also, it does pool up like other people mentioned in the very top underneath the mouthpiece. I'll try what Shane said about adding another washer and see what happens. I'll also purchase another Tube Tank and see if it still leaks from where the sheath and plastic tube meet. All in all, not a bad product. It provides a slightly better flavor than the Lavatube, Oh, also I purchased some 510 to Ego adapters, so that i can use it with my Lavatube Mod. I wish Volcano sold this so I didn't have to go elsewhere!