Here's another update on the airdoser. I actually got it working pretty good, but it took some time. I actually stopped using the needle valve as it was getting clogged too easily. I went back to original standard plastic valve. Another thing that I did too was swap out the original Sobe bottle for a 2L bottle. I did this because I wanted a faster drip rate. It seems that a drip rate of 1 every 3 to 10 seconds works better and is more consistent rate for the plastic valve.