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Place your allen key through the outside screw hole to tighten down the first hex screw into the idler arm.

Then take another rounded hex screw from the stock frame and tighten it into the outside hole.

Lastly, test the mechanism by squeezing it a couple times. The arm should swing smoothly along its screw and bounce back into place. If it’s stiff, loosen the hinge screw. If the arm has space to flop up and down, tighten the hinge screw.

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