This is a remix of https://www.thingiverse.com/thing:1592398.
I wanted an angle finder that did not extend below the protractor so I remixed the above. Added a window on the measuring arm to improve visibility of the angle numbers.
I used a rubber o-ring to secure the arm. It works great. Assorted o-rings can be purchased from Amazon. Example is https://a.co/d/17CngNZ.
[Update Jan 2025]
If you have an AMS/MMU, coloring the visual guide strip provides good color contrast from my own print out especially when coupled with colored numerals on the protractor. I hope you find this useful.
The author remixed this model.
I chopped off the arm extension below the protractor and rounded it off. Also added a viewing window for better angle viewing.
Update Jan 2025