I bought a Riva 901 about 2 weeks ago and started with using carts and got tired of messing with that, then I got a drip tip. The drip tip worked better but I'm getting tired of TH, Vapor, and taste falling off after a few hits. I got some cartomizers but haven't tried them yet. Hopefully I can get one loaded today and try it. Now I'm wondering, is there a "tank" for the 901, or for the use on a 901 with a 901/510 adaptor. I would like one that is trouble free, maybe 1 or 2 ml that can be filled, and you just go till it's empty. Is there anything out there? Thanks.