Clock was inspired by the following post, which was also used as instructions for the whole build. I simply created the case for it that I used, and am sharing it in case others would also like to use it.

Original Post:
https://www.reddit.com/r/DIY/comments/8s1efr/due_to_my_dads_fascination_for_analog_volt_meters/

Other helpful post:
https://old.reddit.com/r/DIY/comments/akc9ft/i_made_a_clock_from_analogue_voltmeters/

Post with finished pictures/clips of my build:
https://old.reddit.com/r/arduino/comments/atqnze/i_made_an_analog_voltmeter_clock_using_arduino/

I think you will have to orient it properly in your slicer. Doesn't need supports.