Hiya. I´m JJ and I worked as a 3d prototype designer a while ago. Yesterday I stumbled over a draft of a door hinge I made in Max years ago. And it was the first test to try my new 3d printer with a model I made myself. I was not sure, if the Ender 3 pro could print this door hinge, but it worked, :)
I added all possible formats (3ds, Max, 3mf and stl) of this 3d modell for a maximum of compability.
Hope you find it usefull :-)