OK - Bed leveling test

This thing will help you check the leveling of your 3D printer bed. It consists of the word "OK", printed in the four corners and the center of the build plate. The model is 0.2mm high, so printing with 0.2mm layer height will yield a single layer. It is adapted for a 200x200mm build plate but can easily be scaled to fit any (square) build plate.

Suggested use:

- Level the build plate as good as possible using whichever method you prefer.
- Print the OK test.
- Inspect the five OKs - if