I noticed that from the factory one of the X axis pulley grub screws doesn’t tighten onto the D profile of the shaft. Maybe it was just a one time fluke, but in the official assembly video I noticed it was the same way. To resolve this, just flip your pulley around and make the end flush like this …

PSA: Check your X axis pulley before assembly

DanStory (Daniel Story) February 5, 2021, 7:21pm 6

Seems to be the common pre-assembled practice.

Might recommend suggesting this to @robgrz

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