This is what I HATE about most of the commercial generators... they keep the MAX current used to make their CS a secret. In other words, take our Pig in a Poke and like it! Well I don't like Pigs in a Poke !
This is the MAIN reason I bought my Silvertron Elite generator... I have FULL control over the max current used to produce silver, where he sets 1 milliamp, and just look at the quality of his silver! I also have full control over PPM.
I think you will like this home made generator, I think it is elegant and will save you a lot of money. It puts YOU in control of production current AND ppm. This is the next best thing to my Silvertron Elite. https://www.youtube.com/watch?v=KgAgsS5h8is