On Saturday, something quite interesting occurred in the development of HHO production as we know it.

Watch this vid carefully: YouTube - HHO experiement with horizontal stainless mesh cell

Of course the volatility of the output is still in question, but I feel that once the vacuum source has been adjusted down to allow for a higher percentage of HHO in the overall output, the gains will be hard to ignore.

I think this fellow has stumbled across something very promising here.