Concrete is now in place. The two short pieces of wood near the middle are for attachment of the HVAC equipment, which will just screw down. I used deck screws spaced about 12 inches apart as anchoring studs for all embedded redwood.
Flatwise 2x4 starts at the high end on the sloping existing concrete (far right above), anchored with double 16d nails hammered into drilled 1/4-inch holes. Tapered formwork was then attached to it for a level top. 2x12's continue over dirt, anchored with standard steel stakes. The 2x4 redwood is just sitting for a dry fit (the sections clamped for glue to dry). It will embed in the new concrete during the pour as a sill plate for some type of screen fence.


Functional design concepts here include an elevated rear shelf/ back splash for extra space off the tight sink area... GFCI outlets inside the cabinet for things like an electric toothbrush charger base or a hairdryer, which can remain plugged in all the time (for extra safety and convenience) because there's a gap for the cord where the face frame bottom rail is left out.