Aloha,
There is also an important radio interview done by the water fuel museum,
http://www.blogtalkradio.com/kywaterfue ... Zach-West/
The interesting revelation here is how separating the sets of series cells into two parallel sets have some benefitual effect.
And Zack seems a little unhappy having decided to run the system under constant pressure. I agree. I am building a similar system to run vacuum, and use a vacuum pump between the WFC's and hydrogen reservoir. In this way, the WFC's will be under constant vacuum, and the hydrogen reservoir will be under positive pressure.
Instead of using electro-magnets to separate the gases, I am using regular magnets, after identifying polarities, and gluing them to the inside of the bubbler. After completed, photos, results, and construction details will be provided.
Bill