Well Opa, I followed your instructions and am very pleased with the final product. Thank you. Thought I would comment on a couple of issues I encountered, for the benefit of others.
I painted with primer and than added several coats of gloss enamel, as the resulting finish seems to clean up nicely. Since the hens seem to prefer a darkened nestbox, I painted the inside fronts with some leftover dark brown paint. I plan to add "modesty curtains" to cover the entrances, and perches after the unit is mounted. (I copied the checkerboard pattern on the back after someone else's nestbox I saw on this site. Sorry, I don't remember to whom I should give credit.)
I ended up with a lip on the front bottom nest boxes of about 1 1/2 in, and on the top row lip of about 3 1/2 inches. I don't know if this was by Opa design, and I don't see it is an issue, but I suspect they will prefer the upper boxes since they will sit lower in them. The floors are painted 1/4 inch thick plywood, and I just have them sitting on the ramps. In this way I can occassionally take them out, clean underneath and add a little Seven dust or DE. When you are making the partitions, and establishing the size of the opening through which the eggs will pass, remember to factor in the thickness of the nestpads.
One question for you, Opa. Did you affix the nestpads to the floor ramp in any way, or do you just let them sit on it? I'm wondering if the chickens will dislodge them without having them tacked into place.