holes of the stepper motor are 31mm apart, while that of the 4cm fan are 32mm apart
Use a smaller diameter screw.
I found OCD diminishes after 55.
You don't even know what I'm doing. How do you know precision is important or not to my application?If you are eager to make some comments, you can ask what I'm doing first.If you are too busy for that, you can simply save your time all together.Why are you doing something in between?
Well nema 17 means 1.7 inch that's 4.3cm, no wonder the distance between holes doesn't match.