Hi keith1961.

Thanks for the pictures.

If you have time take a look at this very interesting tutorials.
These guys really know what they do :)

Auto-Retopo for Hard Surface Models Pt.1
https://youtu.be/trTqnA2M9iE

Auto-Retopo for Hard Surface Models Pt.2
https://youtu.be/PoMewuVdg74

And this very interesting series :

3D-Coat Hard Surface Spaceship Wing Modeling (Part 1 to 9)
https://youtu.be/xYwhgRkdpHQ