This is my own version for testing the accuracy of my Ender 3 Pro some months ago, I needed to verify dimensions of holes and bosses against the 3D model in order to have adjustments for future prints.

For this I used Inland transparent PETG with a 0.4mm size nozzle with a Hotend temperature of 240°C and a heated bed of 70°C (common temperatures in Cura por PETG).

It also has some features to test bridging and retraction.

Hope it works for you and please let me know the result!

Note: I don't have the gcode I used when I print it but when I print it again I'll be happy to share it.