After seen some amazing designs involving chains, I wanted to model something similar.
Why not a Snake Keychain.
I decided that my design will print along the Z axis resulting in a much better surface finished
The links connection were Inspired by many articulated model, sometimes called "flexy", and by the pile of corona Face Shield that lets me print stacked objects.

Once is printed, remove the existing brim an "break" the weak connection in between every links, the articulated connection will remain hidden and working.

MK3

Prusa i3

No

No

.2

15

Prints Standing up
Brim is a must, 5mm or so.
Infill 0% will do it
02 perimeter walls is fine