Depending on the number of colors in your print job, it might take a bit of work to calibrate all the combinations. Two colors mean there will be two tests: A to B and B to A. But as you add more ...
[DaveMakesStuff] uses 3D printed test tubes for plants and similar purposes, and he’s shared how to make them on a 3D printer, complete with different models each optimized for different nozzle sizes.
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