Tolerances were modeled based on my Creality Ender 3 v2 3d printer.

For the measuring arm, the end was made into a rectangle so it could be printed with 0.4 mm nozzle.

Sand the tip so it works properly.

The markings in the photos are appearing wrong for some reason, but the pdf file is okay.

Cut the marking stickers excluding the curved borders for a better result.