The gas cavity or space available for gas is about 2 liters. This cell of mine is not exactly small. I'm am just amazed at how much gas is produced with just 10 watts. I will do a video eventually but I want to do some further testing with different stator cores first. I didn't believe myself what was happening so I did it a few times with witnesses to confirm that I'm not off my rocker. Each test was a complete success. I know for a fact that if I can fix the leaking gas, I can get a much better results. Once the power is turned off the pressure gauge falls faster than it rises. Even with the gas leaking so badly the results are still way, way above what I expected or have seen with other people setups.