Update 20241103:
Have a look at the new design:
https://www.printables.com/model/1061365-foldable-angle-finder
20241031:
I've redesigned the angle template by @DStein_1142144 opting for inserted steel fasteners.The gauges are a bit thicker (3mm). The knob is assembled with one screw and two bolts (M3 x 16 mm screw).
The glider has now a notch.
20241029:
New socket head screw with two nuts instead of countersunk screw.
The author remixed this model.
Steel vs PLA