Do you want something to truly test you 3D Printer Accuracy? Here's a nice and fun test!
This is a small part of a major project I have but also a really cool thing to by it self.
It also helps you understand how gears and gear reductions work.
It's really easy to assemble. You'll just need to glue two parts together and that's it!
Here's a video on how it assembles:
I hope you enjoy It and If you do make sure to like this project!
I recommend you to use a brim to avoid warping.
You can use PLA, ABS ou PETG. Up to your preference.