So I am looking at this piece titled "Ring" and I cant figure out what I am missing in the drawing that cause the elliptical shape at the two hole entrances on the right side of the drawing and the half ellipse in in the section cut.
Close up of oval in right portion of drawing:
Oval shape in section?
What I have tried
When I modelled it I wound up getting this:
Since this is not my field of expertise, the only thing I could think of something like a grinding wheel taking a rounded chunk out at each hole.
Aside from scaling the drawing, does anyone have ideas what is causing the oval shape, and why it would be there?
Isometric views as requested: