Bread-bowl sink is no more. I have moved on to version II.
I hit the jackpot at my local restaurant supply dealer. Same idea but this time the sink will be large enough to actually do dishes.
This version is countersunk into the cabinet top and can be covered with the cutting board. The cabinet top is two layers of 3/8 plywood and covered with 1/8 panel. I will be coating the exposed surfaces (and top) with polyurathane.