This is stage 2 for bed leveling for an Ender3, Ender 5, or many common printers, I call it "Squishing Boxes".

This was designed for a 220mm bed, .4mm nozzle, .2mm layer height, and .4mm line width.

As you print this test, follow the printhead around and try to wipe your prints free from the bed by gently rubbing the lines (or squishing the boxes) until they wont let go easily. Helps get your bed leveling really dialed in, after a standard 5 or 9 point bed leveling routine with paper or post-it notes.

Here's a quick tutorial of how to use it: https://www.instagram.com/tv/B-DmpXLHASF/

I've added CHEP's Bed Leveling Routine for the Ender3, as it's the perfect first step.

Feel free to reach out if you need anything. Im happy to do quick design work for a tip, if I can open source the work and let anyone use it!