I have discovered that there is a angle on the back that goes from 1 1/4" at the neck joint to 1 3/4" just past the horn as seen in this picture. The blueprints did not show this! I found this picture that shows it.
So now I have to figure out how to put the angle on. I was thinking either I will build an angle plate for the milling machine, or machine it in steps, then file it flat, or just take it off on the disc sander (dirty job)
The is a pretty complicated body design, but am enjoying building it. I put the body in the sun today and the green of the poplar did indeed turn brown.
I have the neck fitting, back tummy contour started and the swimming pool for the Kahler routed