I just did a fix using a simple 3D printed part and then thought of all the little things it helps with.
My example is a 42 motorized unit with one of the bolt holes broken. I was able to glue it, but if left that way it would break again.
I needed a re-enforcing piece. I could go find the right thickness of plastic, measure and cut it out, measure and drill a hole. Or I could do a quick simple design and print out a .4mm thick PETG piece. 15 minutes from start to piece in hand.
The plastic surface was scuffed up a little and the glue stuck both togeter well. Thin enough not to cause an assembly problem or be noticeable after assembly. The screw can be tightened and is functional with the re-enforcement.
