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Insert an M3x18mm socket head screw in one of the x_end_idler clamp holes. This screw helps insert the hex nut.

Using tweezers, hold an M3 hex nut so that it can be threaded onto the M3x18mm socket head screw. Tighten that screw until the M3 hex nut is firmly seated.

Remove the M3x18 socket head screw and repeat on the other clamp hole.

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