Editing Step 7 —
Nut Grub Screw

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Add the M5 x 12mm Grub screw to the lead screw nut as shown.

Tighten until you feel some resistance, the purpose of this grub screw is to prevent backlash along the nut and lead screw.

Do not tighten to the point that the lead screw will no longer turn. You should still have smooth rotation of the lead screw through the nut.

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