Discs for Calibration
thingiverse
Simple discs for calibration to save on materials. different sizes for tests. but for z-offset i just use the smallest one and set the print to Skirt adhesion 10 loops 5-10 cm away from the model. this way you have plenty of time to watch and adjust the corner heights and the z-offsets without wasting a huge amount of materialfor towers just scale up the models in the z-axis.
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