This is a 90 degree angle I designed and it has a lot of features. For my own angle i attached a level. Features out of the printer is the center finder, so you can drag over your piece of wood and you have a line perfectly in the middle of the piece.
I´m currently working on a second angle which has different degree angles which can fit on to the two outstanding holes.
thingie_90o_angle_v6.stl | 460.7KB |