My local library charged me 10 cents to print these:
I needed motor brackets for an old Revell chassis, so I decided to try 3D printing some. They're not perfect, but for my first attempt I'm pretty happy.
I used SketchUp to create the parts, but it's not the easiest program to learn. Based on recommendations from the expert at the library I'm going to give TinkerCAD a try.
Ron