Bed Leveling (Tramming) Squares

thingiverse

These are for the CR-10, but you could use the small square file and multiply it to have 9 and then move them to each spot manually in your slicing software. You can adjust the bed on the fly as it prints or wait until the print is done and then see how each square looks. Might take a few times printing, but once all squares look good, then you are good to go. Takes just a few minutes to print once everything is heated up and uses around 1g of filament.