midTbot_esp32
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Suggestion - heavier set-screw pen
I am finding that a heavier/weightier set-screw on the pen improves performance.
E.g. https://nl.aliexpress.com/item/33013216975.html - M5 x 16mm - see https://vimeo.com/353804260.
Nice, The knurled knob is handy as well