I am often asked for real parts with 3D annotation, but unfortunately, especially as a consultant, I can not disclose customer parts and in particular with all the annotation included. So as a policy, I simply don't take the chance. I can tell you that a bunch of holes, bosses, and some screw threads are of no challenge to 3D annotation. Companies like Boeing and Abbott Labs have done away with the drawing process in favor of 3D annotation and they have some rather complex parts. The reported savings in delivering higher quality product through better collaboration (drawings are just an old collaboration method) and delivering to market faster are very reasonable.
I already have a good viewer that reads 3D annotation.
In the meantime, I will try to come up with a more complex example of a 3D annotated part for the audience. Perhaps write another article on the subject.