Walnut shelves

I’ve decided to build a walnut bookcase from some pieces of the record walnut tree in Kansas city. I have a few of the pieces I’ll need, but I’d like to pick up a couple more.
It’s construction will resemble this.

Sorry it’s so tiny.

I want crown molding on the top, and an arch.

The bottom is a simple skirt.

My lumber is 5/4 black walnut.
The dimensions will be 7’x36”x14” It’ll weigh about 400 lbs.

-- Failure does not stop me, it makes me try harder..... because I'm crazy.