wiring a kitchen under counter oven - is this setup correct?
Looks well researched and complete to me.  The wire is perfect. Everything looks right.    

The only thing that bugs me is opportunity cost: some building codes require you fit a 40A or 50A cable for the common/standard electric range/oven. Deluxe homes even like to see that and a 30A run for a separate dual oven.  So if it's easy now and won't be easy later, my inclination would be to throw a 10/3 and 6/3 in the wall.