Guys I don't get it, I have had an LR901 ON ONE OF MY GGTS/AVS Units now for a month. One of the secrets for me is keeping it running correctly and by that I mean by keeping your collector tank dry. even though I use a different O Ring made by Danco, I still get maybe say 3 drops of liquid twice a day in my tank, that's it. when I feel it's in there I always have a syringe by my side, I close my CR tight and turn off my top tank, I suck up those couple if drops with my syringe and then use a tissue to just get the little bit of dampness out of the collector tank as well, I then screw on my Top Tank and open that CR to where I know my perfect draw is, it's the same place every darn time where that CR is set for me, I also believe this is one of the problems that people don't pick up on with the learning curve and that is this, once you have a nice dry collector tank and open that CR, DON'T TOUCH THE DARN THING AGAIN UNTIL YOU HAVE TO REMOVE LIQUID AGAIN. I know sometimes you may have to shut if if your on the run or in the car but then you may have to draw out the liquid say one more time a day, but leave the darn CR alone, to many people I think are turning that CR open shut open shut and playing with the darn thing, it is almost a natural thing to want to turn the CR since it is a moving part but trust me don't do it, simply because it puts air into and creates pressure in the tank and that you don't want because it forces fluid to move into an unwanted place, the collector tank in my opinion. Try what I'm saying and let me know how it works for you guys. This is my system and heck it's not brain surgery and really quite simple and to be able to have 6ml's of liquid and not have to drip or use a cart, carto and have this advanced system and only have to maintain by removing excess liquid that's a pretty darn good and simple process to me, Oh Ya also after I do this quick maintenance by extracting my liquid with the syringe and have my AVS back on and together I lightly out my liquid right back into my Atty and vape it so its not left over in my syringe, its my first new vape after cleaning so no waste