I don’t know how many people have tried the Water4gas plans but they have some major flaws. The biggest thing that I noticed right at first is those cheap plastic lids that they tell you to use for the HHO generator. It was a good thing that I bought extras because I cracked 3 of them while I was trying to drill them. They don’t take much pressure and are far to brittle to be using under the hood of your car. Everytime the vacuum from the engine sucks them down then they start leaking a little worse. Do yourself a favor and get one of the decent generators.