Editing Step 2 —
Prepare Y idler mount

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Take the "y_idler_mount"

Place 1x M3 locknut in the pocket at the back of the part, as shown. Ensure sure the locknut has been fully inserted (use an Allen key or screwdriver) and is correctly oriented.

Thread 1x M3x25 screw through the front top hole and into the locknut. This will prevent you losing the locknut during the next steps.

I you have trouble to thread the screw you can remove the M3 nylock. Then take the M3x25 screw and thread the M3 nylock all the way through. Then remove it from the screw and repeat this assembly. This will make it slightly easier to screw in.

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