Dennis, you've presented a number of great info resources and I can see you'd really like to experiment with the mechanical aspects of generation.
It seems your personal experience in electronics far exceeds that of many of us mechanics stumbling around through the electrons.
Would you present your opinion of the EFIE devices available?
DIY diagrams, kits, and packaged products?
I'd also like to ask you to review PWM info for the group...
...I just saw a built PWM advertised for $65 and I know I probably cannot buy the components for that price, especially if I must track them down, or have them shipped from more than one source... and begin to assemble, with my own rudimentary electronic skills.
It occurs to me, that at this stage of financially pressed experimentation, it could be best to focus design work towards operation at a 20 amp draw, or less, but never to exceed 30 amps.
My logic is that almost any current production vehicle can withstand that additional draw upon the charging circuit and the average Joe can easily benefit from a mason jar HHO generator. We get a greener planet!
Of course experiments go further, yet we're all still undecided about the best configuration for even a basic unit! It hampers progress...
Thanks!