I am Most of the way through this... Perhaps another week and a half to two weeks.
To wit:
I have added a Gnome-Shell theme to predator theme:
I will NOT be making any other Gnome-Shell themes.
Uploaded:
Copperdeck3
https://www.deviantart.com/aravisian/art/copperdeck-III-Theme-896582111
Original by Pixstudio - Treetog
This is an adapted to GTK3 for Linux version... a bit toned down...
Tranquility
Named for the Tranquility base for the Apollo Lunar Landings (due to its Moon base appearance):
https://www.deviantart.com/aravisian/art/Tranquility-896595137
sudo add-apt-repository ppa:aravisian/gtk-theming
sudo apt-get update && sudo apt install tranquility
sudo apt-get update && sudo apt install copperdeck3