These are all lathes with grayscale curvy maps applied. Poly count was over a million but was taken into Hexagon and decimated to 50000. Not merged.(polycount was even higher)
The actual building of all the 'tech' greeble took just a few seconds. Curvy is great for any cylindrical, spherical etc tech stuff.
Then I took it into the alpha of 3dCoat and cavity painted it.
Rendered in Vue 7