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2. BALL BEARINGS
For this step you need the front, back, left and right panels and the 8 ball bearings (Fig. 2). Every panel has 2
corresponding holes.
1. Take a panel, place the ball bearings on the corresponding holes and push them in. Make sure that they are
inserted deep enough and do not stick out. Fig. 3.
Use a redundant piece of wood to push the bearings into the frame.
2. Repeat this step for the other 3 panels.
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