So I carved the top to a cylidrical section. Radius is about the same as the scale length, 27". Readjusted the neck pocket depth and angle four times before satisfied. Now just to decide knob and jack placement. I like the volume knob right under the center of the bridge pickup, but for most people it stands in the way of strumming.
On the last photo there is a pencil line of a planned back contour, but I guess it might be comfortable even without it.