Looking closer at and pausing the video on that ebay auction, it looks like his config is as follows:
-NNNN+NNNN-
I find this especially interesting as so far, when experimenting with this kind of setup, I have placed the negative pole in the middle and the positive on the outside, vice versa to this.
My configuration is thus:
+NNNN-NNNN+
After conditioning and magnetic aligning (I already cross scored the plate surfaces today) I'm definitely going to try a polarity switch just out of pure curiosity. My thinking behind negative in the middle was that current would flow from the center outward, which would present less avenues for current loss in an open bath (voltage entering at the end plates would offer the opportunity for voltage to head off into the electrolyte instead of into the cell pack), although that clearly would not matter with a dry cell.
As for plate gauge, I'm not really sure what he's using there. My plates are Lowes switch plate covers (304SS). I'm trying to keep everything in my design simple in terms of sourcing and working on, mainly because I don't have the facilities (or health) for any serious metal cutting / drilling etc. A plus side of this is that my design should be easily reproducible, if it proves successful.
My design basically goes, from right to left:
Aluminum end
Plexiglas
Rubber insulator
+ Plate
Gasket
Neutral
Gasket
Neutral
Gasket
Neutral
Gasket
Neutral
Gasket
- Plate
Gasket
Neutral
Gasket
Neutral
Gasket
Neutral
Gasket
Neutral
Gasket
+ Plate
Rubber Insulator
Aluminum End
I've utilized the existing holes in the switch plates for the electrolyte flow. Electrolyte will enter at the bottom holes and exit at the top. On each + Plate one of the holes is sealed shut by the rubber insulator. My theory is that the exit pipe will also carry the HHO.
I haven't mounted the lowes hose fittings yet, I'm planning on threading these through an existing hole in the end plates, through a hole in the plexiglas, feeding/receiving fluid from a channel cut into the rubber insulator leading to the respective top or bottom hole. I'm going to need to shorten the threaded end of the hose fittings and will need some sort of adhesive, I'm unsure what yet, to affix and seal them to the plexiglas.
It's lots of fun! I have my customary two days off Monday and Tuesday and am shooting to have this conditioned and installed by Wednesday afternoon. I'm going to use the floor box bubbler that I found at home depot as a resorvoir for now and source a new bubbler.