Thanks a lot for sharing. Using this print I was able to find that there is a little bit of bow on the heated bed

Thanks a lot for sharing. Using this print I was able to find that there is a little bit of bow on the heated bed
Thanks !!!
THANK YOU! not only for the STL's but, the article that got me here! Pay no attention to the fact that this looks mangled. I was so exited that it was perfect that I yanked it off the hot bed. It took a lot to get here and it turned out the only malfunction was I ASSUMED the bed came from the manufacturer clean. It was way filthy! (edited)
NOT THE RIGHT SIZE FOR MY BED BUT CLOSE SO IT WORKER THANK YOU
@Flyer_104287 You can customize the OpenSCAD code to suit any bed size. If you post your bed dimensions, I can try configuring it for you and generating prints. Just let me know the make and model of your printer and bed size.
For RECTANGLEs, on Prusa Slicer, change the "Fill Angle" (under Print Settings->Advanced) to 90deg so that you get consistent line lengths rather than diagonals which are constantly varying in length from '0' to the hypotenuse of the square back to '0'
Very useful. Particularly the single 75mm square. Reconfigured this to print a rectangle across the diagonal for speed but still very practical for testing first level height settings.